diff --git a/externs/.gitignore b/externs/.gitignore
new file mode 100644
index 0000000000..86d0cb2726
--- /dev/null
+++ b/externs/.gitignore
@@ -0,0 +1,4 @@
+# Ignore everything in this directory
+*
+# Except this file
+!.gitignore
\ No newline at end of file
diff --git a/externs/externs.js b/externs/externs.js
deleted file mode 100644
index 546a2be7e1..0000000000
--- a/externs/externs.js
+++ /dev/null
@@ -1,238 +0,0 @@
-var TopLevel = {
-"ActionSheetIOS" : function () {},
-"addEntropy" : function () {},
-"addEventListener" : function () {},
-"addListener" : function () {},
-"addOrientationListener" : function () {},
-"addSymmetricKeyFromPassword" : function () {},
-"Alert" : function () {},
-"alert" : function () {},
-"Animated" : function () {},
-"Array" : function () {},
-"awesome-phonenumber" : function () {},
-"BigNumber" : function () {},
-"blur" : function () {},
-"call" : function () {},
-"callJail" : function () {},
-"capture" : function () {},
-"catch" : function () {},
-"Chance" : function () {},
-"checkVideoAuthorizationStatus" : function () {},
-"clear" : function () {},
-"clearCookies" : function () {},
-"clearInterval" : function () {},
-"clearStorageAPIs" : function () {},
-"clearTimeout" : function () {},
-"clearWatch" : function () {},
-"Clipboard" : function () {},
-"cloneWithRows" : function () {},
-"close" : function () {},
-"closeDrawer" : function () {},
-"codec" : function () {},
-"completeTransactions" : function () {},
-"console" : function () {},
-"contentOffset" : function () {},
-"contentSize" : function () {},
-"create" : function () {},
-"createAccount" : function () {},
-"data" : function () {},
-"DataSource" : function () {},
-"Date" : function () {},
-"DEBUG" : function () {},
-"decay" : function () {},
-"decrypt" : function () {},
-"default" : function () {},
-"defaultPath" : function () {},
-"defaultSeparator" : function () {},
-"delay" : function () {},
-"delete" : function () {},
-"deleteAll" : function () {},
-"DeviceEventEmitter" : function () {},
-"digest" : function () {},
-"Dimensions" : function () {},
-"discardTransaction" : function () {},
-"dividedBy" : function () {},
-"dy" : function () {},
-"encrypt" : function () {},
-"ENC_DEC" : function () {},
-"end" : function () {},
-"endCoordinates" : function () {},
-"Error" : function () {},
-"ErrorUtils" : function () {},
-"eth" : function () {},
-"event" : function () {},
-"fallbacks" : function () {},
-"fetch" : function () {},
-"filter" : function () {},
-"filtered" : function () {},
-"find" : function () {},
-"finished" : function () {},
-"focus" : function () {},
-"forceUpdate" : function () {},
-"fromUtf8" : function () {},
-"fromWei" : function () {},
-"generate" : function () {},
-"geoPermissionsGranted" : function () {},
-"get" : function () {},
-"getAll" : function () {},
-"getBlock" : function () {},
-"getCardId" : function () {},
-"getCurrentPosition" : function () {},
-"getExample" : function () {},
-"getInitialOrientation" : function () {},
-"getLayout" : function () {},
-"getNumber" : function () {},
-"getSyncing" : function () {},
-"getTime" : function () {},
-"getTimezoneOffset" : function () {},
-"goBack" : function () {},
-"goForward" : function () {},
-"goog" : function () {},
-"guid" : function () {},
-"hash" : function () {},
-"headers" : function () {},
-"height" : function () {},
-"hex" : function () {},
-"hide" : function () {},
-"IBGLog" : function () {},
-"initialPage" : function () {},
-"initJail" : function () {},
-"isAddress" : function () {},
-"isConnected" : function () {},
-"isMatches" : function () {},
-"isNaN" : function () {},
-"Item" : function () {},
-"JSON" : function () {},
-"jsonEvent" : function () {},
-"Keyboard" : function () {},
-"layout" : function () {},
-"length" : function () {},
-"Linking" : function () {},
-"ListView" : function () {},
-"locale" : function () {},
-"lockToPortrait" : function () {},
-"log" : function () {},
-"login" : function () {},
-"map" : function () {},
-"Math" : function () {},
-"message" : function () {},
-"moveFile" : function () {},
-"moveToInternalStorage" : function () {},
-"moveY" : function () {},
-"nativeEvent" : function () {},
-"NativeModules" : function () {},
-"Number" : function () {},
-"objects" : function () {},
-"ok" : function () {},
-"openDrawer" : function () {},
-"openPicker" : function () {},
-"openURL" : function () {},
-"OS" : function () {},
-"p" : function () {},
-"panHandlers" : function () {},
-"PanResponder" : function () {},
-"parallel" : function () {},
-"parse" : function () {},
-"parseInt" : function () {},
-"parseJail" : function () {},
-"path" : function () {},
-"PermissionsAndroid" : function () {},
-"Platform" : function () {},
-"post" : function () {},
-"props" : function () {},
-"prototype" : function () {},
-"push" : function () {},
-"random" : function () {},
-"randomBytes" : function () {},
-"ReactNative" : function () {},
-"readFile" : function () {},
-"readTag" : function () {},
-"realm" : function () {},
-"recoverAccount" : function () {},
-"registerComponent" : function () {},
-"reload" : function () {},
-"remove" : function () {},
-"removeAllListeners" : function () {},
-"removeEventListener" : function () {},
-"requestMultiple" : function () {},
-"require" : function () {},
-"reset" : function () {},
-"resetOkHttpClient" : function () {},
-"respond" : function () {},
-"reverse" : function () {},
-"round" : function () {},
-"schema" : function () {},
-"schemaVersion" : function () {},
-"scrollBy" : function () {},
-"scrollTo" : function () {},
-"scrollView" : function () {},
-"selection" : function () {},
-"sendToBridge" : function () {},
-"sendWeb3Request" : function () {},
-"sequence" : function () {},
-"set" : function () {},
-"setAccessToken" : function () {},
-"setGlobalHandler" : function () {},
-"setInterval" : function () {},
-"setNativeProps" : function () {},
-"setSoftInputMode" : function () {},
-"setState" : function () {},
-"setString" : function () {},
-"setTimeout" : function () {},
-"setValue" : function () {},
-"Sha256" : function () {},
-"sha3" : function () {},
-"Share" : function () {},
-"share" : function () {},
-"shh" : function () {},
-"shouldMoveToInternalStorage" : function () {},
-"show" : function () {},
-"showActionSheetWithOptions" : function () {},
-"sjcl" : function () {},
-"slice" : function () {},
-"sorted" : function () {},
-"SplashScreen" : function () {},
-"spring" : function () {},
-"start" : function () {},
-"startNode" : function () {},
-"startNodeRPCServer" : function () {},
-"startsWith" : function () {},
-"Status" : function () {},
-"status" : function () {},
-"stop" : function () {},
-"stopAnimation" : function () {},
-"stopNodeRPCServer" : function () {},
-"stopWatching" : function () {},
-"stringify" : function () {},
-"t" : function () {},
-"Text" : function () {},
-"text" : function () {},
-"then" : function () {},
-"timing" : function () {},
-"toAscii" : function () {},
-"toBits" : function () {},
-"toDecimal" : function () {},
-"toJSON" : function () {},
-"toLocaleString" : function () {},
-"toLowerCase" : function () {},
-"toNumber" : function () {},
-"toString" : function () {},
-"toUtf8" : function () {},
-"translations" : function () {},
-"update" : function () {},
-"Value" : function () {},
-"value" : function () {},
-"ValueXY" : function () {},
-"View" : function () {},
-"vy" : function () {},
-"watchPosition" : function () {},
-"Web3" : function () {},
-"width" : function () {},
-"window" : function () {},
-"write" : function () {},
-"writeTag" : function () {},
-"x" : function () {},
-"y" : function () {},
-"_bodyText" : function () {},
-"_value" : function () {}
-}
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