Adding OnOpenListner for Secondary Menu
Fixing Spelling mistake
Update to android-maven-plugin 3.6.0
Merge pull request #491 from NineWorlds/android-sdk-21

Update to android-maven-plugin 3.6.0
Merge pull request #487 from marutib/master

Adding OnOpenListner for Secondary Menu
Update README.md
Merge remote-tracking branch 'jfeinstein10/master'
Added independent offset for secondary content when using LEFT_RIGHT
Changed touch margin threshold