Dropped support Firefox 21
Upgraded to Firefox 23.0 beta 3

Conflicts:
	theme/chrome/browser/browser.css
	theme/chrome/browser/devtools/commandline.css
	theme/chrome/browser/devtools/splitview.css
	theme/chrome/browser/devtools/toolbox.css
	theme/chrome/browser/devtools/webconsole_networkpanel.css
	theme/chrome/global/inContentUI.css
	theme/chrome/global/notification.css
	theme/chrome/global/toolbarbutton.css
	theme/chrome/mozapps/extensions/extensions.css
Returned support Firefox 22
Upgrade to Firefox 23.0 beta 4
Merge branch 'upgrade-to-23' into master (#194)

Conflicts:
	theme/chrome.manifest
	theme/chrome/appversion/22/devtools/debugger.css
	theme/chrome/browser/browser.css
	theme/chrome/browser/devtools/scratchpad.css