Added hacks for GetEventQueue (so you don't have to edit Events.h)

- define USE_CHECKSTACK
- Comment on defines used

- new SpinCursor (replacing Jack's almost-identical one)
- use GetEventQueue in stead of GetEvQHdr

USE_MAC_DYNAMIC_LOADING are no longer needed. Also, WASTE and IMG
removed in some places.

floatobject.c.

Expanded powi() in-line.

- Use ckalloc(), ckfree() everywhere.
- Default FREECAST to (char *).
- Added comment with Tcl/Tk version info.

Also added print_list() and format_list() which format the output from
an extract_*() routine.

already outdent for those statements.

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')