Calling rna functions with invalid keywords, too many keywords and too many args would fail silently - now raise an error with invalid keywords and a list of valid ones, raise an error when too many args are given. - calling rna functions would alloc a ParameterList each time, changed to use a stack variable (2 pointers and an int). - store the number of parameters ParameterList - python exception types were wrong in many cases, (using attribute error rather then type error) - fixes to small errors in python UI scripts.