Added more powerful lookup of names from Config objects.
Added more powerful lookup of names from Config objects.

* Can now use names of Parameterized objects as prefixes. When resolving
  Params, Parameterized objects will first look for values that have
  their class name as prefix, before looking in the more general
  namespace. Allows better management of parameterized objects
  that have variables that have the same names.

e2crawfo/dps,e2crawfo/dps