Add .gitignore idea working files
Change gradle plugin version to 0.11.0

*Details:
- Android SDK Tools r22.6.4
- Android SDK Platform-tools r19.0.2
- Android SDK Build-tools r19.1
- Android SDK 4.4.2(API level 19)
- Android NDK r9d(March 2014)
- Gradle 1.12 + Gradle plugin for Android 0.11.0

*etc:
- Android Studio 0.6.0