Adds tags to seed data
Adds tags to new item field, assigns @tags in controllers
Adds broken crappy sidebar. I mean what.
Project slimmed down, tags added.

Project no longer has an edit/update action. Along with Tags, Projects are
displayed in a sidebar on every page, with a small single-field form for adding
new ones.

Project no longer has a description either.
Removes superfluous project controller actions/views
My brain is fried. Sorry, future self.
Again, really sorry, future self who has to browse this.

Cleaned up a lot of duplicate instance var settings, so that @projects
and @tags are always set by ApplicationController's get_sidebar_info
method (called by the before_filter callback on a lot of actions).

Did other stuff I can't remember because what the hell am I doing today. :|
Moves item-specific css to its own file.

Also re-works item preview partial to take up less room, and the text version
has a bit of padding in it.
Adds content edit field back to text items
Adds delete button below item edit form.
Adds delete button to project and tag li elements

Currently only displays if the sidebar partial is passed the local variable
:edit => true

Also unstyles all buttons
Fixes crash on non-logged in main#root view