Set minimum API to 17: temporary fix to ensure we don't use heartbleed-vulnerable system OpenSSL (in Android 4.1)
In lists, display "no posts/location" when no summary data is available.
Omit self from composite group avatars
In Edit Group, display composite group avatar (and update in response to changes)
Tweaks to avatar drawing
New edit group action icon
Chat bubbles for posts (still in progress: flip bubble for sent/received posts); stubbed in icons for post delivery status display and post location tag