> java.io.FileNotFoundException: \android-sdk\sdk\tools\proguard\proguard-android.txt

Wondering where is “proguard-android.txt” in the lates ADT (rev 23)?
No worries! The universe is not collapsing. It is just a packaging bug! 🙂

https://code.google.com/p/android/issues/detail?id=72400

Download your own local copy or proguard-android.txt