- Updated panel texture to add grayed out locations for 'locked' buttons.
- Added a button class that handles button presses, texture changes and other simple button tasks.
- Side panel now uses buttons instead of placeholder textures.
- Side panel now has page indexing and allows user to cycle pages.
- Added several textures used or to be used as buttons.
- Unity's Event.Current is now stored in the main class for use by buttons.
- Restructured side panel class a little bit to use a static shared material for all draw events.