Themes install endpoint: new endpoint to install themes
Fixing a bogus require
Theme delete endpoint: created and endpoint to delete a theme
Removing some unneeded properties
Theme install endpoint: fixing error handling
Theme Install / Delete: improving error handling
Plugin Delete Endpoint:  do not delete an active plugin

The WordPress dashboard does not allow one to delete an active plugin,
neither then should the API.
Theme delete endpoint: do not delete active theme

The WordPress dashboard does not allow one to delete an active theme,
neither then should the API.
Merge branch 'master' into theme-installs
Merge pull request #1246 from Automattic/theme-installs

Theme installs