Bug 993971 Preview lightweight themes from the Apply Theme menu r=Neil
Bug 797240 Update app-license.html to refer to MPLv2, add links to the SeaMonkey Project and about:rights r=Gerv r=mcsmurf

Ports the following bugs:
Bug 464994 - about:license and about:rights potentially contradict each other
Bug 730814 - update about:license to MPL 2. Also add a link to the FAQ,
correct a few inaccuracies about what license applies to what, and make the
document validate as HTML5
Bug 934361 - Remove CHROME_DEPS