Merge pull request #80 from WatanabeYasumasa/gacco2/master

UPDATE UI for gacco
discussion modules on aio-8
Merge pull request #81 from skim-ks/gacco2/master

discussion modules on aio-8
Update po/mo files
Restore lms/static/sass/course/base/_base.scss
Merge pull request #82 from yokose-ks/gacco2/master

Restore lms/static/sass/course/base/_base.scss
Update po/mo files
Update video modules and tiny bugfix
Merge pull request #83 from skim-ks/gacco2/master

Update video modules and tiny bugfix
Fix untranslated messages
Merge pull request #84 from yokose-ks/gacco2/master

Fix untranslated messages
UI UPDATE 2014_06_09