Whitespace.

PEP-8 and whitespace removal.
Clean up unnecessary variable.
Add JS DataSource abstraction for wrapping JSON blobs.
JS string formatting parameter substitution.

This changes the string usage pattern from:
r.strings.stringname to r.strings('stringname', parameters).
Add js.py/strings.py as deps to JS modules.

If either python file changes, we may need to change the compiled JS
files. We'll take the conservative approach and always rebuild.
Move nonessential JS to the bottom of the page.
reddit.css -> reddit.less

Note: you'll need to update your .ini stylesheet name to have a .less
extension.
Fix LESS syntax error and color issues.
Add Backbone JS lib.
Add request timer intermediate for "post".
stats: Add timing logging capability.

This also rejiggers stats timing code to record a start and end time
instead of a duration, so timings can be plotted on a timeline
visualization.
Fix typo in admin page menu.
Add admin bar: top bar UI for status info/stats/tools.
Load admin bar backbone with noConflict.

This is to avoid conflicts with Backbone on the about pages until
Backbone is in the main JS lib.
Prevent framing on prefs pages.

Thanks, /u/olemoudi.
Darken "mellow" infobar border.
Replace reddit_first cookie with client side logic.
Rename show_firsttext to show_infobar.
Delete obsolete cookies.
Clean up infobar logic.