merged conflicts from: ihanged signature of Whiteboard.drawLine() to take in a width as well.

Conflicts:
	src/common/Color.java
	src/common/Point.java
	src/common/Whiteboard.java
	src/server/SessionHandler.java
put in manual tests, and did a bit of ClientGUI.java
Merge pull request #17 from hogbait/starting_client_gui_messages

Starting client gui messages