Fix slicing of environment overrides and comment
Allow ElasticSearch to be configured via env variables
Merge pull request #1327 from hypothesis/elasticseach-env-config

Allow ElasticSearch to be configured via env variables
Temporarily disable functional tests

These have been so unreliable as to be useless. Disabled for now.
Make sure assets are built before js tests
Isolate static assets in h:static

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
Move fonts to h:static/fonts

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".