Fix #1210 (sort of)

No better source available.
Create _GLOBAL_CONTEXT earlier so plugins can register things there (needed for series plugin)
use follow_symlinks in os.walk. Fix #1206
oh, I should stop being a moron
added Nikola favicon by @Aeyoun
Fix #1211 -- fix Unicode args on Windows.
add favicon @ 512x512 png
Fixed CSS not being applied on Safari
Add permalink in listings pages
add canonical links for listings
make the listings directive work again
Merge pull request #1213 from getnikola/permalink-in-listings

Permalink in listings
Updated SVG logo (no visual change)

Non-destructive size-optimized SVG.
Now compatible with Internet Explorers.

PS: The `viewBox` may need further work.
Revert "Updated SVG logo (no visual change)"

This reverts commit 83459d3fd0c2d7d44643c071f3ab38f00997f6d2.
use .html extension for HTML files created by listings plugin
Merge pull request #1212 from getnikola/fix-1211

Fix #1211 -- fix Unicode arguments on Windows.
Merge branch 'permalink-in-listings'
fix #1217 -- explicitly list English for colorbox

Signed-off-by: Chris “Kwpolska” Warrick <kwpolska@gmail.com>
Disable debugging config_changed

Maybe that should be set to trace priority or something, since it's insanely verbose.
Emergency sanity fix to <html> output

Sacrifice readability to get a sane start. While we wait for pretty.