We saw errors from duplicate loading of LocalEmail and
LoginFormatValidation. The latter resulted in a crash.

In an attempt to ensure all subclasses of Couchrest::Model::Base are
loaded Couchrest::Model::Utils::Migrate requires all files in app/models.
We have an extension that does the same for the engines.

During this process LoginFormatValidation and LocalEmail were autoloaded
when 'identity' was required. Afterwards they were required again.
It looks like rails' autoload mechanism does not play nicely with require.

So to make sure they are not autoloaded first move the concerns and
helper classes into the lib directory and require them explicitly.

Just in case some translation keys are not present things should still work and make sense.
So translation keys should be picked in a meaningful way and scoped rather than prefixed.
For example overview.account will turn into "Account" if no translation is present while "overview_account" will turn into "Overview Account". We usually want the former.

close and open actions for plain opening and closing the tickets
respond_with so fields are not cleared on invalid update

the custom actions are not strictly restful. But adding a subresource felt like too much overhead and is conceptually hard to grasp (so we destroy the openess of the ticket to close it?).

Also renamed help to support so it's harder to confuse it with documentation