Adding forwarding key value retrieval.  Dedicated action functions.
Adding forwarding key value retrieval.  Dedicated action functions.

To retrieve the value of a key, get_config(key) has been added.
This function also forwards keys to components.

The actual actions (setting, unsetting, retrieval) have been moved
to simple, dedicated functions, to allow for easy overloading without
corruption of the forwarding mechanism.

friedrichromstedt/keyconf