made various updates to the GUI. 
- added in character icons on the board
- highlighted the icon squares background in blue whoever is the current
player, this updates appropriately when end turn is pressed
- added in a message that indications whose turn it is next
- changed colour scheme to be similar to original cluedo board
- got current players card displaying in panel underneath canvas, this
updates when changed turns
added in photos of the dice to the dialog that tells them how much they
have rolled
- if they click after they have rolled already, the message tells them
what they rolled the first time
Merge remote-tracking branch 'origin/master'

Conflicts:
	Cluedo222/src/cluedo/ui/Board.java
	Cluedo222/src/cluedo/ui/CluedoCanvas.java
	Cluedo222/src/cluedo/ui/CluedoFrame.java