Introduction current_rails_admin

[ingeniarius]

Instead of using '_current_user' or 'current_user'
we can to introduce 'current_rails_admin' which would point to existing app methods:
current_user, current_admin, and etc

[bbenezech]

I think _current_user was made for that purpose. We should auto-detect that anyway. I'll have a look at all this tmrw. Thanks.

[bartocc]

I don't see the benefit of current_rails_admin over _current_user.
@ingeniarius, what would it be ?

But there is definitely a bug in the _header partial
current_user is used on lines 10 and 11 while it should be _current_user

The README should also be more explicit after
rake rails_admin:install model_name=member

and specify how to use config.current_user_method

[ingeniarius]

I just said that will be good to have special method which is not intersect with existing and _current_user looks like "private" method.

What do you think about?
instead of:
instance_eval &RailsAdmin::Config.current_user_method

just call a predefined method by name:
send RailsAdmin::Config.current_rails_admin_method