Add a temprorary hack as a directive triggered by the form-error-list
class which polyfills the `ngModelController` methods `$setTouched` and
`$setUntouched`.

The form styles and the directive both rely on the form-error-list
element being nested as a sibling of the field to which it relates.

From now on the form module should be used and extended.

This removes the background and borders from the button.

These new styles include labels by default and error styles. It also
gives a little more breathing room between form elements.

The buttons now have a more consistent hover/active state without the
glossy highlight and the disabled state looks disabled.

Starting with the form elements, the new view is available at
/dev/pattern-library and currently only shows form fields.

Update Annotor's PDF plugin to 9acc6554 (typed-packaging).

Remove useless Annotator source maps. Fixes #1341.

This change was necessary to adapt to updates of the PDF.js version
shipped with newer FF releases.

There were three small changes. Our code now works with both
the old version (currently used with Chrome) and the old version
(embedded in FF).

Turn the standalone page into the app

Close #427
Close #754

Fix quirks with show/hide on the search bar

This is a small consistency improvement which ensures that whenever the
search is cleared the input becomes invisible. Previously, this only
worked correctly on the sidebar. Now, it works everywhere, including
when navigating using the back button to get to the unfiltered stream.

Isolate static assets in h:static

Drop the icomoon directory, saving only selection.json. The rest is not
needed, and is regenerated from the .json by the icomoon app.

Drop the font icon declarations in base.scss and use the css generated
by icomoon.

Move everything to h:static/fonts.

The icomoon css is not in styles because it has "fonts" as a relative
url, and we want "../fonts".

There are a number of reasons to isolate the static assets into their
own directory.

- An edge case in Pyramid: https://github.com/Pylons/pyramid/pull/1377
- Make serving them with a reverse proxy safer by ensuring that no code
  or configuration lives beneath the static directory
- Cleanliness

To avoid a big move happening shortly after this, also rename some of
the asset subdirectories to close #1317.

- js -> scripts
- css -> stylesheets
- lib -> scripts/vendor
- lib/images -> images
- browser/chrome/js/background.js -> browser/chrome/background.js
- browser/chrome/public/js/destroy.js -> browser/chrome/public/destroy.js

Finally, the locale directory was totally busted. The annotator.po file
included is the defualt locale, and it should have been .pot. Since it
includes only the default strings, there's no reason to serve it. I've
stripped it and we'll reinstate it correctly later.

Close #1311

374 sign in button firefox fix

If anyone doesn't like this, it's easy to revert, so it's going
straight to master.

Improve the usability and transitions of toolbar

Change the toolbar transitions, hover actions, and push states to
improve usability and feel.

- Animate from the right, so that all buttons enter as a group, so
  as to give them all equal "weight"
- Colorize the pushed buttons even when not hovering so it's easier
  to see which are active
- Further emphasize pushed state by "docking" them to the right
- Rework curves, delays, and durations for great beauty
- Show hidden buttons when hovering anywhere, not just the top

Close #1268

Turn Stream into App