Merge remote-tracking branch 'rod/master'
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Created Docker build image for Go-Android library.

Also updated BuildTools version to match version in build image. Note that AndroidApp/make.bash doesn't work yet.
Use Java 7 in build image. App now builds in image.
Added 'all' and 'verbose' flags to build command
Added some suggested items to gitignore. Committing cleaner version of some Android Studio files.
Merge pull request #42 from adam-p/master

Create Docker image for building Android Go library