Fix copy-pasta that prevented some site options from being updated
Switch over to the options map approach network settings uses
Add more general, permalink and reading options
Some discussion settings support
Don't call `switch_theme` if the theme is already set appropriately
Add plugin support to network sites region

Whilst we don't want to copy the entirety of the Site Settings region into network sites, active plugins a similar configuration task to active theme
Merge pull request #27 from danielbachhuber/site-settings-27

Do another pass on Site Settings Region