Create CONTRIBUTING.md
Merge pull request #63 from stephanenicolas/patch-2

Create CONTRIBUTING.md
Fix task dependency graph
Merge pull request #64 from SuperJugy/test_issue-60

Fix task dependency graph. Fixes #60.
Released V1.6.2 to Maven Central
Prepare for next Iteration
Update to Gradle 2.1, Android plugin 0.13.0 and coveralls plugin 2.0.0