Replace python-specific path-coloring hack with a generic mechanism

Replace python-specific path-coloring hack with a generic mechanism
- Use a table of regex pattern - attribute list pairs to apply any
  additional path based attributes. While the fundamental type of a file
  certainly does not depend on its location on the filesystem, its
  location *does* have attached semantics and it'd be just silly to
  ignore that fact.
- The current implementation is dumb as it ends up recompiling the regexes
  and splitting the attr strings a million times. OTOH compiling the
  regexes into the static rpmfcPathTable would be wrong as the patterns
  can contain macros and they can vary from package to package when building
  several packages on one invocation. The attribute split + regex compilation
  should be done once per rpmfc instanciation...