Data API experimental scaffold.
Degrade features for pro version.
Moved some keywords assistant metrics and terms for pro.
* Fixed playground JavaScript.
* Update object stat after upgrade.
* Removed some object stat columns for pro version.
* Removed today and fixed period method for pro version.
* Plugging object stat update process.
* Changed object stat columns to list_property based.
Shows summary and evaluated date on listing and editing.
Merge branch 'master' into features/data-api
Implemented Data API.
Permission system.administer includes system.ma_manage_period
Added filter attribute to GAProfile.
Pro version uses this filter attribute as profiles customfield.
Merge branch 'master' of github.com:miyanaga/mt-more-analytics

* 'master' of github.com:miyanaga/mt-more-analytics:
  Add scale attribute to ga:chart.