Move immutable lookup dicts out of function scope
Move immutable lookup dicts out of function scope

These never change, so initializing them once when the class is loaded
is much better than initializing them once per time the function is
called.

Signed-off-by: Dan McGee <a6e5737275ff1276377ee261739f3ee963671241@gmail.com>

toofishes/python-pgpdump