Fix reversed method references

According to docs on kombu.serialization.register the params order is (name, encoder, decoder, content_type, content_encoding). This caused us a bit of grief as I was too lazy to read the actual docs on register() :)
344 - added the skip decorator to three tests.

Three tests were missing the @skip_if_not_module('redis') decorator.

https://github.com/celery/kombu/issues/344
Adds Randy Barlow to AUTHORS
344 - added the skip decorator to three tests.

Three tests were missing the @skip_if_not_module('redis') decorator.

https://github.com/celery/kombu/issues/344
Adds Randy Barlow to AUTHORS
epoll unregister catches fileno TypeError
Adds Tobias Schottdorf to AUTHORS
Extra check for #342
kombu[librabbitmq] now depends on librabbitmq 1.5.1
kombu[librabbitmq] now depends on librabbitmq 1.5.1
Bumps version to 3.0.16 and updates Changelog
Merge branch '3.0'
Priority support for MongoDB transport. Transport table update. Priority
conversion unification.
Be selective about how file descriptors are removed since they may be reused for a different purpose.

Kombu was removing them after they were being reused by another worker process.
Be selective about how file descriptors are removed since they may be reused for a different purpose.

Kombu was removing them after they were being reused by another worker process.
Adds Roger Hu to AUTHORS
Adds Roger Hu to AUTHORS
master now depends on Python 2.7
Using print function
parse_url function should not know about mongodb, and the transport already sets can_parse_url