2**32 is 0 on some Python 2.5 installations
Now depends on amqp 1.0.7
Updates Changelog
Tests passing on Py2.5
Bumps version to 2.5.6
Now depends on amqp 1.0.8 (fixes Py2.5 syntax error)
Pools: Do not try to release lazy resource yet to be evaluated.  Fixes celery/celery#190
Merge branch '2.5'

Conflicts:
	kombu/connection.py
	requirements/default.txt
Use except as exc