[Bug 615722] Disallowing url encoded slugs

Those slugs are bad. Bad slug bad.
Update database strings for l10n.
[Bug 693699] Error when deleting no messages

This patch adds an error if you click on Delete selected or Mark
selected as read in the inbox interface. A very straightfoward change.

Fixed line formatting

SQUASHING ALL THE BUGZ!
updating optimizely project code to our new one
Get rid of fixtures in gallery tests.
[bug 741782] Convert questions tests to model makers.

Die fixtures!
[Bug 737214] Added gradient as bram suggested.
Remove race condition in test.
Fix formatting in test docs
Move reference to correct section
[Bug 887962] Related in mobile view is not a blob

There is a bullet point again.
[bug 885795] Get Involved button on product page
[bug 885793] Remove top navigation
[bug 884105] Add product filter to questions view
Fix retina icons
[Bug 887017] Add GA tracking to related links.
[Bug 867221] Show hot questions on product pages.
[bug 892610] Patch TestWikiVideo with mediocrity

This changes the test so it accepts the previous output I was getting
and the new output I'm getting now. I suspect the difference in my
system is that I updated from libxml2 2.8 to 2.9.1 and in doing that
I get slightly different output.

This is goofy, but I think both outputs are "good enough" and I think
Ricky said the video stuff in the wiki isn't long for this world anyhow.
Fix bug number transposition typo
[bug 741789] Stop using fixtures in access tests.