Added new project 'BizChat' which will house production code for this project. Made some abstractions of service/database/xmpp logic in the 'teamchat' project to clean up the code (the code is not necessarily as stable, but since we moved on to a new Xcode project, I've left it in this state, if you would like the original stable version, please check out the initial commit in this repo).

All future commit messages will refer to the 'BizChat' project only:

- Created base structure
- Added dummy data to contacts screen
- Created methods for sorting contact data by company domain or alphabetically
- Created skeleton for the chat room screen, including some dummy data for private/public chats
- Created object models for rooms and users
- Created a base chat room view, still struggling with keeping the content above the keyboard