fixes #2299 - Parameters Controller (API v2) can reset parameters (delete them all)
fixes #2291 undefined method 'to_a' for 75:String when creating host WITH taxonomy
Add localization calls to the subnets and the trenda pages.

There are other changes to the common layouts based on simple testing.
Use proper syntax for step 2 title, comment by Joseph Magen
Load the apipie documentation when calling '/api'

The documentation is used to list the links for the resources. We make
sure it's loaded.