fix removeUtms for urls with anchors
Add maintenance README and fix minor download bug

Neither of these changes requires that an existing maintenance page be
rebuilt.

The bug fix ensures that downloads are only attempted on strings found
within `url(...)` in *CSS* files, so that downloads do not start (and
fail) when `url(...)` is encountered in JavaScript and SVG files.
fix bug 937723 - correctly handle the difference between document tags and search filter tags.

This also fixes an inconsistency in indexing the tags, they are now enforced case sensitive.
The “Web Developement” search filter had also a broken tag (with quotes).
fix bug 938631 - reordered some token filters in our custom analyzers to make sure we take lower case earrlier into account in the analyzing chain
fix 938670 - boost documents zones in the search results.
Add required border above Tabzilla

Fulfills requirement 3 from this page:
http://www.mozilla.org/en-US/styleguide/websites/sandstone/tabzilla/
Commented up and reorganized stylus stuff
Merge pull request #1662 from jezdez/case-sensitivity-tags-937723

fix bug 937723 - correctly handle the difference between document tags and search filter tags.
Merge pull request #1663 from jezdez/case-sensitivity-938631

fix bug 938631 - reordered some token filters in our custom analyzers to make sure we take lower case earrlier into account in the analyzing chain
fix bug 939181 - Add Firefox to the Zones menu and homepage
Merge pull request #1664 from jezdez/boost-zones-938670

fix 938670 - boost documents zones in the search results.
Merge pull request #1665 from openjck/tabzilla-border

Add required border above Tabzilla
Add --watch option to compile-stylesheets
Merge pull request #1657 from groovecoder/fix-removeUtms

fix removeUtms for urls with anchors
Merge pull request #1661 from openjck/maintenance-improvements

Add maintenance README and fix minor download bug
Merge pull request #1667 from darkwing/stylus-commenting

Commented up and reorganized stylus stuff
Merge pull request #1669 from openjck/stylus-watching

Add --watch option to compile-stylesheets
Merge pull request #1670 from darkwing/firefox-menu-939181

fix bug 939181 - Add Firefox to the Zones menu and homepage
fix bug 939167 - Move tags to bottom of doc
Fix bug 936456: Migrate users.css to users.styl