Added gradle support to the owncloud-android-library
Merge branch 'develop' of github.com:owncloud/android-library into buildsystem/gradle_develop

Conflicts:
	.travis.yml
Update .gitignore and readded missing files
Restore .gitignore, remove files that were added
Added the missing character in the .travis.yml
Merge pull request #38 from owncloudChalmers/buildsystem/gradle_develop

Gradle building system