now derive from InterpolationError, which is not raised directly (only
subclasses get raised).  This matches what the docs already said.

a month or two with great success.  Barry may want to tweak it some, but I
think it's a worthwhile enough addition to get some more people trying it
out.

645404).  I'm not 100% sure this is the right fix, so I'll keep the
bug report open for Samuele, but this fixes the index error and passes
the test suite (and I can't see why it *shouldn't* be the right fix
:-).

any_missing() returns less bogus missing modules.

- I've rewritten scan_code() more or less from scratch,
factored bits and pieces out for readability.
- keep track of global assignments and failed imports per
module; use this to determine whether the Y in "from X
import Y" is a submodule or just a global name. This is not
100% doable: you can't tell which symbols are imported when
doing a star import of a non-Python module short of actually
importing it.
- added a new method to ModuleFinder: any_missing_maybe(),
which returns *two* lists, one with certain misses, one with
possible misses. The possible misses are *very* often false
alarms, so it's useful to keep this list separate.
any_misses() now simply returns the union of
any_missing_maybe().

TODO: documentation, test_modulefinder.py

Cleanup whitespace.
Fix unbalanced parenthesis.

docs.  Replaced it with an XXX block, because the hoped-for treatment
of DST endcases remains unclear (Guido doesn't really like raising an
exception when it's impossible to deliver a correct result, but so
far I have no way in hand to consistently deliver a defined incorrect
result either).

we'll simply revert to \mailheader since there's no other good name.

- some minor cleanups

Fix a curly brace that should have been a paren.

Add some times

Document that getatime and getmtime may return floats.

 - add new modules (zipimport, datetime, _random, bz2, _symtable)
 - build pyexpat with expat sources from Python distribution
 - regression test with and without compiled bytecode

- whitespace normalization