Use wider letter-spacing in name on profile

A letter-spacing of -2px looks great on page titles, but makes profile
names look a bit too tight and somewhat out of place.
fix bug 915063 - Changing see also case, enforcing link colors
Make Demo Studio links appear over spotlight image

Fixes this bug:
https://twitter.com/johnkreitlow/status/380344466512437248
Do not display zone image over zone subnav
Add margin-bottom to all content tables

Some tables, such as the one appearing on the "Where is Mozilla" page,
were not getting margin-bottoms because the property was only applied to
.text-content (wiki) tables.
Fix bug 936636: Remove "Page" from search buttons
Basic stylus cleanup
Cut the footer height by half
rate limit ES index task
Merge pull request #1624 from openjck/next-previous

Fix bug 936636: Remove "Page" from search buttons
Merge pull request #1625 from openjck/profile-letter-spacing

Use wider letter-spacing in name on profile
Merge pull request #1626 from darkwing/see-also-case-915063

fix bug 915063 - Changing see also case, enforcing link colors
Merge pull request #1628 from openjck/derby-links-clickable

Make Demo Studio links appear over spotlight image
Merge pull request #1629 from openjck/zone-image-z

Do not display zone image over zone subnav
Merge pull request #1630 from openjck/table-margin-bottom

Add margin-bottom to all content tables
Merge pull request #1632 from darkwing/stylus-cleanup-more

Basic stylus cleanup
Merge pull request #1633 from darkwing/footer-height-squeeze

Cut the footer height by half
Merge pull request #1627 from groovecoder/rate-limit-search

rate limit ES index task
Merge pull request #1631 from jezdez/improved-indexables-928302

fix bug 928302, 929373, 931412 - Check if the search index entry of a wiki document should really be updated during saving or deleting.
Refactored search view to be API based and implemented complex filters.

This also includes other fixes:

- added django-dbgettext as a simple way to handle dynamic translations
  via the standard gettext API

- a fix for calculate_related_documents the cronjob function to
  actually use the correct table for document tags