Replace current configuration mess with a trimmed down version of the
original vision of #200. Configs are collection of config groups that
have fields that can be set. These groups allow organizing the fields
as well as opertunity for plugins to add their own groups. By default
plugins have an auto generated group with the enabled field.
Change Instance class to be a subclass of Link and refactor the
communication to and establisment of instances to use a virtual
connection between the slave and the instance. This is simplifies the
implementation of plugin communication for instances.
Replace InstanceRequest with a forwardTo option to Request which does
the task of forwarding in a much cleaner way.
Hornwitser