Make force-loading optional; don't force-load in interactive mode.

Make synopsis() load modules as '__temp__' so they don't clobber anything.
Change "constants" section to "data" section.
Don't show __builtins__ or __doc__ in "data" section.
For Bob Weiner: don't boldface text in Emacs shells or dumb terminals.
Remove Helper.__repr__ (it really belongs in site.py, and should be                 guarded by a check for len(inspect.stack) <= 2).