1. Convert to using re module

2. Added two new exception classes

    a. MissingSectionHeaderError which signals an early parsing
       exception when options appear in the file before any section
       header.  Previously a bogus TypeError was thrown deeper down.

    b. ParsingError which collates any non-fatal parsing errors.
       ConfigParser.read() will raise this after the entire file was
       parsed if any errors occurred during parsing (client could just
       catch the exception and continue, because the ConfigParser
       instance would still be initialized with the valid data).

   (small note: Error.__msg => Error._msg)

3. ConfigParser.__read() now uses re which has the following minor
   semantic change: underscore is now allowed in section header and
   option name.  Also, because of the old regexps, theoretically.
   Fixed continuation line bug reported by F. Lundh.

4. It seemed that the old ConfigParser automatically added the option
   `name' to every section, which contained the name of the section.
   This seemed bogus to me so I took it out.

initMacOS().

are in the appropriate sections.

Some minor nits.

The text is almost completely from GvR's essay on packages; some
introductory paragraphs have been removed, and everything after the
'Details' section in the HTML has been dropped (seems too technical).  A
paragraph has been added after the sample package layout stating that there
must be a file called__init__.py in a directory to make it a package.

# later release.

Use logical (& consistent) markup.

Added a see-also section at the end.

Need to add \optional{} to sort argument too.

Made x a \var in descr of pop.

Fixed note for pop() and mentioned that it is experimental.

Also added pop to index.

# The brackets generated by \optional{} are real ugly.  Alas...

article().

article() commands.

.mirrorinfo.  Fix by me to call string.lstrip(filename) to cope with a
bug in strop.strip() in Python 1.4.  Additionally, I changed all print
statements that print filenames etc. to put them in backquotes so that
it will be more obvious when there's a funny character on one of them
(such as a space...).

groupdict() and findall().

exception waiting to happen next...

should never be called, so this isn't really needed, but this
signifies that rexec now supports packages -- because ihooks does.

didn't want to commit until it had been tested.  I presume that it
works in Grail.)

string.  Added groupdict() to MatchObject -- return the named groups
as a dict.  Added default argument to groups() to specify what to
return for unmatching groups; groupdict() also has this.

the '%' should be put back in.