Updated to current build tools revision (WindowObserver fix)
Fixed: Topic 18260 - Handle console messages that don't have a source name
First-run page redesign
Addressed remaining comments from http://codereview.adblockplus.org/11039060/, removed unused image and compressed other images better
Fixed display of Chinese social icons on first-run page and slighly simplified the corresponding rules
Fixed: Link titles displayed on first-run page reversed
First-run page redesign: Addressed remaining comment from http://codereview.adblockplus.org/11039060/
Worked around bug 924340, updating extension will fail in current Firefox nightlies
Updated locales from Crowdin
Releasing Adblock Plus 2.4
Added tag 2.4 for changeset b839e6d17efc
Updated locales from Crowdin
Updated locales from Crowdin
Prepared for Safari port.

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extra : amend_source : 0aee2d862441114fd6b1e67adc23b087050d233a
Fixed nits from downloader review (http://codereview.adblockplus.org/11153017/)