More rational destination for texi2html.py.

to split.  Document new conventions for split(fields) and
join(fields), where the *fields variant is identical to the other.

Give capwords a default pattern argument which will recognize words as
sequeces of [a-zA-Z0-9_].

unpicklable.

- define tp_getattro, tp_setattro
- use precreated string objects for most common exceptions and method names

(especially IndexError which is caught by 'for')

Don't use assignments into inst.__dict__ to restore instance
variables; use setattr() instead.

Extended split() (and hence splitfields(), which is the same function)
to support an optional third parameter giving the maximum number of
delimiters to parse.

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

frozen code.

Fix leak and unchecked error in complex().