updates for POC

- fixed new emotions not being created
- fixed new notesets not being created
- worked on fixing database leaks
- cleaned up label details activity formatting
- connected label color to emotion details activity
- created custom adapter for "list all labels" activity
- added custom adapter for "list all bookmarks" activity listview
- fixed double playback for apprentice activity
- looked into using graphics for note playback visualization
- added simple noteset visualizer to "generate" activity