Introduces 'resettable' directive which runs at super high priority
and listens for the '$reset' event on the scope upon which the
element is stored to its pristine condition via a full element
transclude.

closes #159

closes #233

- Drop deform from angular app -- this was too confusing and strange
  and makes it harder to pull the front-end application out of the
  repository.
- Make the sheet much more attractive by tying it to the toolbar
  in a clearer way and toggling between "Sign in" and the close 'X'.
- Start to normalize the way errors are handled in form submissions
  on the back-end by offloading basic validation messaging to the
  front-end, removing the need to constantly re-render the forms.

Still to do: flash messages (#233)

fixes #228

closes #219
closes #182
closes #162
closes #150
closes #104

Chrome is bugging about it and won't submit the form on the
first 'enter' press.

In the editor, should show detail view of the new annotation,
while, in the detail viewer, should stay put.

... to arrive at parity with h/develop.

I find this easier to read.

"Unless there's a detail being shown, calculate the dynamic bucket,
but if there's no heatmap, then show nothing."

When Angular compiles a directive the transclude linking function
passed to the compiler is not passed on to child node compilations
unless the current node performs no linking. When the current node
does have a linking function it's expected that the node requested
transclusion and the child transclusion function is passed in place
of the one that the compile service was called with. During linking,
however, any transclude function passed to compile is bound and passed
to children so that the the $transclude service can be provided to
controllers.

Unfortunately, ngRepeat uses the transclude linking function available
to directives and not the tranclude service available to controllers
so elements with link-performing directives on the path from the
recursive element to an ngRepeat directive will break transclusion
since ngRepeat will receive a null transclusion function. When it
links its children, the null transclusion function is made available
as the $transclude service rather than the bound transclusion function
which ngRepeat was, itself, linked with.

All of this is a bit orthogonal to the change, but the change is made
because I think it makes more sense for what I imagine could be common
usage of the recursive directive.

Implement deleteAnnotation in the host to remove temporary
highlights after annotations get their ids assigned.

Eventually, I'll make it switch from editor to detail when you
save an annotation, but I'm having some weird issues with racing
scope values that I don't understand.

Conflicts:
	h/css/app.scss

... just hide it. This avoids a flash of the detail listing going
away before the panel slides away and also makes reloading the
same panel instantaneous.

This setting can mess with the dirty caches of Chrome, and probably
other browsers, forcing compositing and forcing repaints for pixels
which would otherwise just be scrolled. It also plays poorly with
the CSS3 Transform being used for the sliding panels, making the
background "snap" when the transform finishes.