[Android] Create AnnoSingleton class
Merge branch 'develop' of github.com:usersource/anno into feature/android-plugin
[Android] Added plugin setup function
[Android] Added function to show feedback list page
Merge branch 'develop' of github.com:usersource/anno into feature/android-plugin
[Android] Code refactoring
[Android] Showing custom info activity for plugin
[Android] Code refactoring
[Android] Added function for reading JSON file and parsing it
[Android] Code refactoring
[Android] Added function to read plugin config
[Android] Email address are required to show feedback list page
[Android] Code refactoring
[Android] Code refactoring
[Android] Added support for shake to feedback
[Android] Code refactoring
[Android] Code refactoring
[Android] Showing plugin options on shaking
[Android] Showing proper image in AnnoDraw after using shake menu
[Android] Updated UI of shake popup menu