Partial fix for colon separator not appearing properly between username and message.
Also fix (in item.js) for server crash when carriage return hit without typing anything in the chat window:
colloqi/app/models/item.js:35
    return message.length > 0
                  ^
TypeError: Cannot read property 'length' of undefined
    at model.ItemSchema.methods (/home/ravindra/dev/colloqi/app/models/item.js:35:19)