Change positioning on topbar to fixed

Changed positioning on topbar to fixed on the streams page. It's much more consistent with design on feed-type sites like Facebook and Twitter.
Changed icons to give them a consistent style.
Happy new year
Setup Gunicorn logging
Run tests on localhost only
Added loading icon suggestion and basic CSS.
Revised CSS as per @tilgovi and @jtremback's suggestions.
Tweaked appearence.
Use explicit rather than implicit wait in tests

Hopefully, this will make some errors more apparent and provide a
more consistent run between environments.

In particular, the iframe switch has been failing in travis. Maybe
this will help.
Unused imports and pep8 in tests
Replace 'has_key()' with 'in'
Revert "Run tests on localhost only"

This reverts commit affd934690fc6fcdc2fa7bf4b8216bc7020ff2f1.

Just in case this is interfering with travis-sauce, because new
problems just surfaced and I want to be sure it's not this.
Add extra information to the home.pt file.
Merge pull request #1038 from RawKStar77/MoreIconWork

Changed icons to give them a consistent style.
Merge pull request #1048 from RawKStar77/homepagemakeover

Added contributing information and useful resources to the homepage.
Merge pull request #1026 from RawKStar77/streamloadingicon

Added loading icon suggestion and basic CSS.
PEP8
{tool,top}bar fixes for high dpi

This moves away from measuring layout of non-typographical elements
in ems, favoring px for better consistency across devices with different
pixel densities. While that may sound backward, the reality is that CSS
pixels are device independent, and non-integer em values seem to be handled
less consistently.

Finally, there were some font size and line height tweaks made here to match
the new measurements of the top bar. This provides a consistent feel to the
top bar across devices and dpi.
--use-mirrors for pip is no longer needed

http://legacy.python.org/dev/peps/pep-0449/
Remove -b from gunicorn Procfile command

This opens the possibility for a production.ini which lets does not
specify the binding and lets the PORT env variable dictate the proper
binding.