Merge pull request #209 from shenrie/master

Fixed debugging statements and bumped ion-defs
Enhanced RR find and added resource type cache to datastore
Initial implementation of O(1) extended association attributes
Fixes to datastore and extended resource framework
Code polish for extended resource framework associations
Fixes to extended resource framework
Skipped unit test for extended resource framework
Merge pull request #210 from mmeisinger/fix_OOIION625

Fix OOIION-625: Scalable extended resources queries
Fix corner case in extended resource framework
Reduces memory consumption in stream pubsubs.

The XP route objects were being unneccesarily created for every publish
action, the object is now created during instantiation and simply
referenced during the lifespan of the publisher. This eliminated some
leakiness.
Merge pull request #211 from lukecampbell/streampub

Reduces memory consumption in stream pubsubs.
Adds OrderedSet to pyon utils
Adds unit test for OrderedSet
Merge pull request #212 from lukecampbell/orderedset

Adds OrderedSet to pyon utils
Fix extended resource unit test