move remotedraw/ to main/remotedraw/; fix build.xml
package-ify classes for modular design; fixes javadoc

Conflicts:

	src/remotedraw/client/MainFrame.java
	src/remotedraw/client/ServerSetup.java
	src/remotedraw/client/SessionTab.java
	src/remotedraw/client/Threads.java
	src/remotedraw/protocol/MessageParser.java
	src/remotedraw/protocol/MessageType.java
	src/remotedraw/server/MainServer.java
	src/remotedraw/tools/AbstractTool.java
	src/remotedraw/tools/ColorPickerTool.java
	src/remotedraw/tools/PencilTool.java
	src/remotedraw/tools/RectangleTool.java
	src/remotedraw/tools/Toolbox.java
resolve previous merge conflict; fix inter-package dependencies