modify walk to handle dicts and list instead of all __iter__ ables; use it for utf8 encoding
Merge pull request #320 from pkediyal/COI-655

modify walk to handle dicts and list instead of all __iter__ ables;
Should only be checking policy for RPC request messages
Bumped ion-defs
Base agent cleanup.
Cleanup base agent.
Merge branch 'master' of github.com:ooici/pyon
Fix for handling Set in IonObject walk
Merge pull request #321 from shenrie/master

Fix for handling Set in IonObject walk
Fixed test to pass the appropriate header
Merge pull request #322 from shenrie/master

Fixed test to pass the appropriate header
Refactored dymanic method execution as pyon util
Implemented new XACML tags for executing functions
Merge branch 'master' of github.com:ooici/pyon
Merge pull request #323 from shenrie/master

Implemented new XACML tags for executing functions
fix merge conflict