updated changelog for 1.0.0rc1
download x-tag-core if nothing was selected
Merge branch 'master' of github.com:mozilla/brick
added x-tag core to component listt as disabled and selected
Merge branch 'master' into gh-pages
changed default grunt command to build entire site, fixed demos location
Use 0.9.3 x-tag-core
Merge branch 'master' into gh-pages