refs #2146 - ensures redirect does not break on api requests too
fixes #2138 - Ensure at least one Location / Organization exists
refactor - move clone taxonomy to models
fixes #1999 - Allow org/location to selectively ignore a domain, subnet etc

TODO:  excluding views
fixes #2001 - Changing Loc or Org after compute resource selection give 500 error
hosts mulitple
adds nullify when deleting taxonomies
fixes #2033 - Cannot assign a host to an org

Now its possible to change Locations / Organizations only via mass assign
Refactoring on @ohadlevy's branch orgs-refactor
DRY locs/orgs controller and views
changed to app controller
change selected_ids
refactored check for orphans
changes to taxonomies_controller
new org wizard.