TASK-24: Create in-game ui sprites
Merge pull request #33 from DanLatimer/topic/TASK-23

TASK-23: Add GameState, Opponent initial choices event
Merge pull request #32 from doagz/TASK-24

TASK-24: Create in-game ui sprites
TASK-14: Create screens and graphics for title screen and vehicle select
TASK-6: improve MainMenuScreen

- add background image
- update UI elements position
- scale text based on screen density
Merge pull request #34 from doagz/TASK-14

TASK-14: Create screens and graphics for title screen and vehicle select
Merge pull request #35 from nathanmyles/TASK-6

TASK-6: improve MainMenuScreen
TASK-16: improve VehicleSelectionScreen

- add new buttons
- add background
Merge pull request #36 from nathanmyles/TASK-16

TASK-16: improve VehicleSelectionScreen
TASK-21: Fix angle calculations
Merge branch 'master' of github.com:tdyer-aio/megathon into topic/task-21

Conflicts:
	core/src/ca/nakednate/game/models/vehicle/Tank.java
Merge pull request #37 from tdyer-aio/topic/task-21

Topic/task 21
TASK-27: Support different colours of vehicles
Merge pull request #38 from tdyer-aio/topic/task-27

TASK-27: Support different colours of vehicles
TASK-23: Refresh button / Accept Game dialog
Exception Handling