Fix num_unread*2 on minimized chat

When chat was minimized the counter num_unread of unread message was increment when receiving a compose message so the number of unread messages was doubled.
Merge pull request #267 from Deuteu/message-counter-fixes

Fix num_unread*2 on minimized chat
Don't increment unread msgs counter for <paused> chat state.

Also update release notes. updates #267
Merge pull request #269 from gbonvehi/master

New build that does not include jQuery
Small change to remove need for jquery-private-external.js updates #269
New builds. updates #269