python - fe: Update for use with new project versions.

Log Message:
-----------
Update for use with new project versions.

Details:
- Simplify connection instantiation
- Use pqueue's Queue object to manage protocol transactions
- Remove transport abstraction in favor of passing the I/O routines
directly to the management object. (Helps make for a smaller/neater stack :)
- Provide a mechanism to allow the user to make use of StringFormats
- Break things. Sigh. Really have to stop taking giant leaps. :(

Modified Files:
--------------
fe:
setup.py (r1.7 -> r1.8)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/fe/setup.py.diff?r1=1.7&r2=1.8)
fe/src:
dbapi2.py (r1.4 -> r1.5)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/fe/src/dbapi2.py.diff?r1=1.4&r2=1.5)
prime.py (r1.1.1.1 -> r1.2)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/fe/src/prime.py.diff?r1=1.1.1.1&r2=1.2)
python.py (r1.8 -> r1.9)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/fe/src/python.py.diff?r1=1.8&r2=1.9)
tracenull.py (r1.33 -> r1.34)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/fe/src/tracenull.py.diff?r1=1.33&r2=1.34)
fe/test:
tracenull.py (r1.18 -> r1.19)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/fe/test/tracenull.py.diff?r1=1.18&r2=1.19)

Removed Files:
-------------
fe/src:
abstract.py
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/fe/src/abstract.py)
transport.py
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/fe/src/transport.py)