[docs] Simplify Android setup instructions

docs/DevelopmentSetupAndroid.md

@@ -7,31 +7,34 @@ permalink: docs/android-setup.html
 next: tutorial
 ---
 
-This guide describes basic steps of the android development environment setup that are required to run React Native android apps on an android emulator. We don't discuss developer tool configuration such as IDEs here.
+__NOTE__: This guide needs to be extended for Windows. Can you send us a pull request?
 
-These instructions only cover installation "from scratch". If you happen to have some old, outdated version of Android SDK make sure to update required packages to the version mentioned below and install all the missing ones and make sure `ANDROID_HOME` points to your existing SDK.
+This guide describes basic steps of the Android development environment setup that are required to run React Native android apps on an android emulator. We don't discuss developer tool configuration such as IDEs here.
 
-### Install and configure SDK
+### If already have the Android SDK
 
-1. [Install the latest JDK](http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html).
-2. Install the Android SDK with `brew install android-sdk`.
+1. __IMPORTANT__: Make sure the `ANDROID_HOME` environment variable points to your existing Android SDK
+2. Make sure to update the required packages to the versions mentioned below (see screenshots)
+
+### If you don't have the Android SDK
+
+1. [Install the latest JDK](http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html)
+2. Install the Android SDK with `brew install android-sdk`
 3. Add this to your `~/.bashrc`, `~/.zshrc` or whatever your shell uses:
         export ANDROID_HOME=/usr/local/opt/android-sdk
-4. Start a new shell and run `android`; in the window that appears make sure you check:
+
+### Configure your SDK
+
+1. Start a new shell and run `android`; in the window that appears make sure you check:
   * Android SDK Build-tools version 23.0.1
   * Android 6.0 (API 23)
   * Android Support Repository
-5. Click "Install Packages".
+2. Click "Install Packages"
 
-### Install and run Android stock emulator
+![SDK Manager window](/react-native/img/AndroidSDK1.png) ![SDK Manager window](/react-native/img/AndroidSDK2.png)
 
-1. Start a new shell and run `android`; in the window that appears make sure you check:
-  * Intel x86 Atom System Image (for Android 5.1.1 - API 22)
-  * Intel x86 Emulator Accelerator (HAXM installer)
-  ![SDK Manager window](/react-native/img/AndroidSDK1.png) ![SDK Manager window](/react-native/img/AndroidSDK2.png)
-2. Click "Install Packages".
-3. [Configure HAXM](http://developer.android.com/tools/devices/emulator.html#vm-mac).
-4. Create an Android Virtual Device (AVD) to use with the Android emulator:
-  1. Run `android avd` and click on **Create...**
-  ![Create AVD dialog](/react-native/img/CreateAVD.png)
-  2. With the new AVD selected, click `Start...`
+### Install Genymotion
+
+1. Download and install [Genymotion](https://www.genymotion.com/)
+2. Open Genymotion
+3. Create a new emulator and start it