Don't display interface links if proxy address is localhost

The default is localhost and there is no requirement or instruction
to change this value. When ArchivesSpace is being accessed in a non
localhost context the default behavior is unreasonable as the links
will not work. Therefore only display links between interfaces if
the proxy urls are not localhost (sites can choose to override this
however they like).
Add rights_transferred to locales enums
stupid fricking thing to make selenium consistantly fill in the RDE row form in both headless and nonheadless mode. :(
adding spec to make sure EAD export has one linked agent creator w/out any terms
Merge pull request #95 from mark-cooper/locales_rights_transferred

Add rights_transferred to locales enums
Merge pull request #96 from mark-cooper/hide_interface_links_if_localhost

Don't display interface links if proxy address is localhost