Bug 1115064 - Fix small errors and make Gradle integration work in Android Studio 1.0.2. r=me

The important change here is that we allow the Android-Gradle plugin
to be version 0.14.4 or version 1.0.0, which appears to work in
IntelliJ 14.0.2 and in Android Studio 1.0.2.

Testing feedback came from imjalpreet and garvank.

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extra : rebase_source : 2b93dd91603666f1c6a1d2fe0fa7721d5741bdda