Upgrade jQuery from 1.9.1 to 1.11.1 .
Upgrade jQuery UI from 1.10.2 to 1.11.0 .
Autocompletion of member handles in all textareas and text fields.
Sort handle autocompletion list.
Make handle autocompletion more robust (re: edge cases).
Autocompletion: Use some of our own colours for highlighted item.
Merge branch 'username-autocompletion' of github.com:Libertree/libertree-frontend-ramaze
move memberHandleAutocompletion to Libertree.UI module
rename: username_linker -> comment_jid_linker
update libertree-model

post.mentioned_accounts should match JIDs
add JID renderer for JIDs in posts