Manage: First iteration on new JSON API endpoints.
+ Active Theme:  'sites/example.com/themes/mine'
+ Change Theme:  'sites/example.com/themes/mine' POST theme
+ List Theme: 'sites/example.com/themes'
+ Activate Plugin:  'sites/example.com/plugins/<plugin_name>/activate'
+ Deactivate Plugin:  'sites/example.com/plugins/<plugin_name>/deactivate'
+ List Plugins: 'sites/example.com/plugins'
Manage: Use JSON API standards.

Return an Id for each object.
Manage: Jetpack Modules management JSON API endpoints.
+ Activate Module:  'sites/example.com/jetpack/modules/<module_name>/activate'
+ Deactivate Module:  'sites/example.com/jetpack/modules/<module_name>/deactivate'
+ List Modules: 'sites/example.com/jetpack/modules'
Fetch plugin update info.
Merge branch 'jetpack-api-endpoints'