Refactored container datastore layer to support different datastore backends
Refactored couchdb datastore
Added call tracer utility to container
Added couchbase datastore backend
Added PostgreSQL datastore backend
Added postgres and neo4j prototypes
Enhanced postgres geospatial column handling
Drop connections on force clean postgres database
Int test and with-pycc updates for postgres
Bumped ion-definitions
Reset ion-definitions pointer to match master branch
Merge pull request #434 from mmeisinger/pg_r2

CIDEVSTC-201,202,203: Pyon enhancements for Postgres / REL2