Set Tk variable argv0 to classname passed in to Tkapp_New.  (Fred)

frozen code.

Fix leak and unchecked error in complex().

sys.argv[1], effectively merging the fields.

maximum number of delimiters to parse; e.g.
splitfields("a,b,c,d", ",", 2) -> ["a", "b", "c,d"].

optional third argument gives a maximum number of delimiters to parse.
The new function splitx() is like split() but returns a list
containing the words as well as the delimiters.

longer complain that __getinitargs__ is an ugly name.

codegen.

moved some urls around, reformatted.