Close #1420

Add the citation back into the annotation card

[no ci]

This fixes #1390. A new controller for the standalone annotation
allows us to determine how to render the annotation and this information
is passed down to the AnnotationController via a combination of scope
properties and attributes.

There are now two distinct states for an annotation, either embedded in
which the annotation is rendered on top of the original document or
standalone, where it appears separately from its document.

Get rid of app_directives.coffee and make it into annotation.coffee
under the directives folder. Put the annotation controller from
controllers.coffee in with it.

Notification email copy and formatting

Simplify the tags input styles

* Simplify the tags, no gradients or drop shadows.
* Use less padding to make them smaller.
* Remove the background color so they adopt the input background. This
  works nicely when the field loses focus.
* Increase the hit area of the delete button. It now takes up the entire
  right side of the tag.

 - PDF: Support latest PDF.js (v1.0.277)
 - TextRange: Handle an error condition

More robust error checking.

Drop tagit

Styles the ngTagsInput

Fix height typo on target.pos property

* Remove cartoon quotes.
* Use a class rather than styling all blockquotes.

It left a single pixel, which looked like a rendering glitch.

Move dropdown to the left of the timestamp to ensure timestamps are
always in line. Vertically align the baseline of the timestamp with the
username.

Now just uses the default browser title functionality.

This reverts commit a86e72e3db9b22245bfd0f301dd9b0f4c6b9469f.

This dependency is already pulled in by controllers.

The way our coffee is being bundled is actually problematic because
each of the individual files insn't wrapped in an anonymous function,
only the whole coffee bundle is. Therefore, the configure reference
in socket.coffee should have failed. It doesn't. Who knows what else
might be confused as a result of this situation. I'll sort it all out
this week.

And remove leftover plus_1.png reference.

Drop heatmap comment tab and convert tabs to css

CSStweaks3

Kicking off work on revamping the heatmap a little bit. This change
removes the comment tab. Clearly, something needs to be done to restore
discoverability to comments, but there seemed to be some consensus that
the comment tab was not comprehensible enough.

Additionally, I got pretty sick of the tabs bouncing around. I removed
the transitions, slimmed the tabs down a litle bit, and remade them in
pure CSS. The pure CSS has the advantage of avoiding extra network
requests to fetch the tab SVGs. Also, the SVGs contained some padding
and borders that is easier to account for if its all in the CSS.