Bumped versionCode.
Add year #74
Display Category Icons #75 (data model and database persistence)
Measure timing
Removed unused image resources
Display Category Icons #75 (database cache)
Display Category Icons #75 (generic background tasks, caching and http requests)
Display Category Icons #75 (display icon)
Display Category Icons #75 (looser coupling between classes and improved event listener support)
Moved some classes to dedicated packages