Updated Test Driven Development (markdown)

Test-Driven-Development.md

@@ -9,7 +9,7 @@ Afterwards you can initialize a contract and pass arguments to its contractor:
 
 ```SimpleStorage = EmbarkSpec.request("SimpleStorage", [150]);```
 
-You can then interact with the contract normally. e.g ```SimpleStorage.set(100)```
+Embark will look for the contract at ```app/contracts/*```, compile it and run it in a VM. You can then interact with the contract normally. e.g ```SimpleStorage.set(100)```
 
 An caveat at the moment is that the return values are represented as strings. So ```SimpleStorage.get()``` will return ```"100"```