Merge pull request #217 from nifgraup/master

Empty mailpile works now. (Item 0 doesn't exist.)
ACTUALLY added basic drag & drop AJAX calls to tag API- FUK git. Issue #213
Fix bugs in tag/untag
Make help stop erroring out
Added search.js back to mailpile.js and fixed hiding of hidden things
Added new font icon, exposed conversation thread count in Inbox
Refactored drag drop to contain AJAX call and prepping for multiple (borked)
Added Underscore.js
Fixed up Drag & Drop to send multiple MID, added bulk_cache as well as add/remove funcs to MailPile prototype. Issue #213
Handle the foo[] convention of ajaxy form uploads
Avoid a predictable KeyError crash
Avoid The and Mr etc. in short names in lists
Network graph fixed, kind of.
Moving towards status-only based GPG interface.
Fixed search terms on network view.
Tiddying up pile results CSS & HTML that is shown
Starting to work on scroll panes
Making commit to calm rebase down
Made view_size affect #header and #container as well- a bit rough, but better
More config.py work