Polishing menus and fonts: iteration #1

This pull request contains the following changes:

* Added new button images to simulate menus.
* Added character mugshots for trade and item equip sequences.
* Fixed menu transition states, but reverted them once menus removed. 
* Added dodge animation for assassin.

**Future Updates**

* Attack overlays (backgrounds) for battle animations.
* Draw images for player -> enemy phase transitions.
* Draw item icons for trade and inventory.
* Draw weapon durability for inventory and trade.
* New battle animations (if time permits).
* Generic enemy modal.
* Button animations.
* Get image for modals (bland blue background as of right now).
* Place name for enemy and weapon image in battle summary modal. 
* Get image for character stat screens.