fix: we no longer use bootstrap
ADD: new jquery plugin for setting cursor positions
FEAT: set cursor to a nice position

Set cursor to the first empty field or, if none empty, to the content
textarea. Within the content textarea, set it to the first quoting
character; we assume that in most cases you don’t need to change the
greeting.

Closes #156
reindent

ruby-mode for Emacs 24.4 change its indenting behaviour.
FEAT: implemented retagging

Closes #84
fix: check if tags are valid on update, too