Merge pull request #7 from objectiveSee/master

User can specify custom bubbleView using the bubbleView property of HPLChatData.
Merge pull request #8 from objectiveSee/master

Support for avatars that are not UIImageView + removed ARC
Add concept of grouping, so that messages sent in quick succession are shown together. Also remove deprecated word wrap method
Changed getText method to use standard naming convention (ie. just 'text')
Added curly brackets around if-statements in initalizers.