clean up
Revert "remove firefox/tw"

This reverts commit 9cd1ec67934f6401f357682bc653eea446f837d1.
Merge branch 'refs/heads/firefox-tw-prepare-merge'
frontpage event for Firefox tw ver
firefoxtw: add events tracking code
firefox-tw: remove dummy file, optimize js loading
Merge branch 'refs/heads/firefox-tw-prepare-merge'

Conflicts:
	htdocs/index.shtml
firefox-tw: fix IE & webkit
Merge branch 'refs/heads/master' into production