initial commit GUI
added GUI Components
Merge branch 'master' of https://github.com/T1m1/de.htwg.se.monopoly.git

Conflicts:
	HtwgMonopoly/.classpath
	HtwgMonopoly/resources/Messages_de.properties
added panel with gamefield
added action listener to GUI
added path constants
Merge branch 'master' of https://github.com/T1m1/de.htwg.se.monopoly.git
added GUI to GITHUB