Implement Chat View

[trane]

This will be the main place to chat. Needs to include

• a back button to go back to the server lists
• the notification (message aggregator) should be visible until the keyboard comes up

[trane]

Links should be opened in a webview so that we don't leave the app to open up safari. Supposedly this is dead easy to do.

[basepi]

Notification view/message aggregator will not be part of the chat view, right? The chat view controller will handle that.

[trane]

Two things that I think we should do (after seeing your chat view):

1. I think the send button should just be a default apple send button
2. The keyboard should stay open until the user clicks on the text part of the chat view, not upon sending a message. That would get annoying to deal with having to click on the input bar every time you want to type.