Upgrade to Firefox 29.0 beta 1

* Remove animations of sync button in active state (#231)

* Add icons for developer, email-link, save-page and characterencoding buttons

* Drop Movable Firefox Button and FxButton extensions support

* Remove background of #header on about:addons page (#172)
Add Australis support in extension
Fix padding of urlbar
Improve "tabs on bottom" tweak
Correct toolbar-drag usage
Fixed pinned tabs position
Improve Customize mode
Upgrade to Firefox 29.0 beta 2

Conflicts:
	theme/chrome/browser/browser.css
Fix cut/copy/paste, zoom control buttons (#172)
Remove border beetween star and view-more parts inside #bookmarks-button (#172)
Add "GNOME Tweaks" link to Customize page
Upgrade to Firefox 29.0 beta 3

Conflicts:
	theme/chrome/browser/browser.css
	theme/chrome/browser/customizableui/panelUIOverlay.css
Switch to tabs on bottom by default (#236)
Remove MS Windows support (#122)
Improve window controls
Symbolic icons in main menu (#172)

Also:

* Added emblem-shared-symbolic.svg icon
* Removed #switch-to-metro-button
* Fixed icon of #webrtc-status-button
Update Adblock Plus support (#172)
Pull updated icons from upstream
Wrong branch, revert commit
Added proper 'save page' icon.