Model Classes / tests project

Created classes to model the chat rooms.
introducing new hungarian prefix, crm -> ChatRoomModel
Removed ChatRoomInfo from ChatRoomModel (update)
Created test project

AddedFiles:

HallwayModel.java - contains map from cri to crm, and relevant operations.
ChatRoomModel.java - contains set of users, list of messages, and relevant operations.
tests/src/com/example/realtalk/test/TestChatRoomModel.java
tests/build.xml
build.xml
[other test project auto-generated files]

Modified Files:

none