ultisnips update

Signed-off-by: Andrei Thorp <athorp@evernote.com>
added gundo

Signed-off-by: Andrei Thorp <athorp@evernote.com>
implemented xcode build shortcuts for evernote

Signed-off-by: Andrei Thorp <athorp@evernote.com>
vimrc reorg

Signed-off-by: Andrei Thorp <athorp@evernote.com>