* Added common style properties for houses
* Added unique displayable for gold when in the main room
* Unified currency screen to support arbitrary displayables and properties.
* Unified transforms
* Put interface elements onto interface layer
* Hooked house points into the new currency screen
* Improved animation and display of values during animation.
* Allow independent animation of each supplied displayable
* Remove redundant code
* Added house points to states.env
* Added visuals for when points are added or subtracted
* Updated points increment animation and refactored the screen
