Merge pull request #86 from WatanabeYasumasa/gacco2/master

UI UPDATE 2014_06_09
Update po/mo files
fixed bugs on EDX-396
Merge pull request #87 from skim-ks/gacco2/master

fixed bugs on EDX-396
Merge pull request #88 from WatanabeYasumasa/gacco2/master

UI UPDATE 2014_06_10 AM
Fix untranslated messages
Merge pull request #89 from yokose-ks/gacco2/master

Fix untranslated messages
Update po/mo files
fixed rest of EDX-396
Merge pull request #90 from skim-ks/gacco2/master

fixed rest of EDX-396
Merge pull request #92 from WatanabeYasumasa/gacco2/master

UPDATE UI 2014_06_10 PM
EDX-329: Fix encoding error in _record_feedback_in_datadog
Merge pull request #93 from yokose-ks/EDX-329

EDX-329: Fix encoding error in _record_feedback_in_datadog
change requirements
Merge pull request #94 from YoshidaKS/EDX-399

change requirements
Fix untranslated messages for course_about.html
Merge pull request #91 from yokose-ks/gacco2/master

Fix untranslated messages
Fix untranslated messages for help_modal.html
Merge pull request #95 from yokose-ks/gacco2/master

Fix untranslated messages for help_modal.html
UPDATE UI 2014_06_11 AM