Bug 851161 preventing panels from being used with per-window private browsing
Merge branch 'master' of git://github.com/mozilla/addon-sdk into 851161

Conflicts:
	test/addons/private-browsing-supported/main.js
Merge pull request #858 from erikvold/851161

Fix Bug 851161 preventing panels from being used with per-window private browsing r=@Gozala