more testing.
updated the set of files to be uploaded in releases for deployment.
Merge branch 'feature_travis_ci' of https://github.com/DroidPlanner/droidplanner into feature_travis_ci

Conflicts:
	.travis.yml
Merge pull request #822 from ne0fhyk/feature_travis_ci

Feature travis ci
fixes travis ci failures because of licenses.
Merge pull request #824 from DroidPlanner/feature_travis_ci

Fix travis ci failures
Merge branch 'master' of https://github.com/DroidPlanner/droidplanner into feature_analytics
updated gradle tools version to support android studio beta release.