Simple interface "pdb.run('<statement>')" added.

Rewrote has_magic using a regular expression match.

Split off file cache to module 'linecache'.

new grammar (global, '==').

leaving additional options for the command to handle.

expr/assignment statement now allows testlists.

Introduced egrep() and emgrep() variants.
Use '==' for equality test.
.,

New class syntax

Replace regexp by regex.