update Mac B2G to latest (2012-12-31) localizer build
update Gaia to latest (2012-12-31) nightly
update to 1.0rc1 versions of B2G/Gaia
Merge pull request #255 from mykmelez/update-b2g-gaia

update B2G/Gaia to 2013-01-15 (Firefox OS 1.0RC1)