[bug 903192] IE popup blocker prevents users from downloading Firefox
Add form CSS and examples to Style Guide
Bug 859427
Bug 910894 - Cleanup pep8 violations and have jenkins run flake8

Add flake8 to requirements
[bug 911674] Optimize have-it-all animations for Firefox OS page
[fix bug 903508] Link to English or obsolete articles in Get Involved
Bug 891835 : extract comments in pot files into lang files

* gettext.py/pot_to_langfiles() updated to extract comments from pot file to templates/*.lang files
* gettext.py/_append_to_lang_file() now outputs comments if they exist
* dotlang.py/parse() has a new optional parameter: extract_comments=False
* l10n_merge uses extract_comments=True
* updated test_merge_lang_file()
* added test_parse_with_comments()
* all tests pass
Bug 891835: Improve test coverage of gettext.py module.
Update pot_to_langfiles function to use default lang files.

Was using old defaults instead of the list from settings.
Also should not skip untranslated since it's reading from
templates.
Add visual design guidelines for Firefox OS
Bugs 870998 872747 8873482 872747 884424 863160
at2x retina image function - refs bug 898013

Mozilla.ImageHelper class that handles detecting high-res display and also handles showing high-res images as well as handling platform images
Bug 906176: /media to /static conversion
Work around the jingo-minify bug
Change STATIC_* and MEDIA_* settings