Fixed comments in number methods list

,.

turned abs() and divmod() into generic versions;
added pow().

in the reference to the reference document.

Dispatch needn't check for win = self.win.

Added Turbo C milli functions (courtesy Mark Anacker)
Disable THINK C sleep for 4.0

Sort some method lists.
Increase max #menus, and give more reasonable error message
if exceeded.
Remove window setfont method.