Docstring updates.
Docstring updates.

Added some new docstrings, and fixed up some PEP 257 compliance stuff.

celery/kombu,tkanemoto/kombu,iris-edu-int/kombu,Elastica/kombu,tkanemoto/kombu,ZoranPavlovic/kombu,ZoranPavlovic/kombu,cce/kombu,jindongh/kombu,Elastica/kombu,iris-edu-int/kombu,jindongh/kombu,daevaorn/kombu,mverrilli/kombu,daevaorn/kombu,mverrilli/kombu,numb3r3/kombu,bmbouter/kombu,bmbouter/kombu,urbn/kombu,cce/kombu,numb3r3/kombu