Log Message:
-----------
Add Transaction descriptor.
Also, alter procmethod descriptor to be a tuple subclass to enforce
immutability.
Modified Files:
--------------
ip/src:
__init__.py (r1.1.1.1 -> r1.2)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/ip/src/__init__.py.diff?r1=1.1.1.1&r2=1.2)