introduce PlayerIcon enum class
new player constructor creating a player with an icon
new constructor of the player controller recieving a map with player
names and icons
introduce new startNewGame method for starting a game with names AND
icons
Merge branch 'master' of https://github.com/T1m1/de.htwg.se.monopoly.git

Conflicts:
	HtwgMonopoly/src/de/htwg/monopoly/controller/impl/Controller.java
	HtwgMonopoly/src/de/htwg/monopoly/entities/impl/Player.java