[Bug 952429] Add holiday calendar .ics files and json metadata
[Fix Bug 952429] Add Lightning holiday calendar index page
Bug 876814 - Manifesto Pages Update
Fix Bug 439031 - Missing link(s) to system requirements page
Bug 948517, striptags filter blocks should be escaped
Make subject line of contribute email for end-users localizable.

Keep the existing filterable subject lines for Mozilla contacts.
Fixes 854992
Consolidate press kit redirects for Bug 957664
Merge pull request #1583 from sgarrity/bug-957664-press-kits

Consolidate press kit redirects for Bug 957664
Upgrade python-memcached to a supported version.
Bug 912055: Update basket-client
Redirect Firefox VPAT pages to archive
Bug 960064
Bug 912055: Support invalid email errors from basket.
Bug 900426 - tabzilla.js: 200 instead of 304
Bug 900426: Add tests for new decorator.
Merge pull request #1589 from sgarrity/bug-960064-vpat

Bug 960064 Redirect Firefox VPAT pages to archive
Fix Bug 831810, append UTM params for GA
Remove home search field. Bug 958255.

- GA experiment has completed.
Merge pull request #1593 from jpetto/bug-958255-remove-home-search-field

Remove home search field. Bug 958255.
Merge pull request #1592 from kyoshino/bug-831810-mwc-redirect-utm

Fix Bug 831810, append UTM params to the MWC redirect for GA
Bug 925278: redirect ku and gd locales to bedrock page for firefox/channel