Add notice about PG 9.2 and Rails 4
Connect to PostgreSQL db instead of SQLite3
Add test model with json field
Add configuration for postgresql db
Add the test for model with JSON field
Add a mixed Model with both json type & normal data type
Check if fields (assumed to be json) in Neoid's json_field get stored
Modify test for model with json field to have both json and non-json data
Allow Neoid to have a json_field declaration
Merge json field's content to Neo4j node properties
Merge branch 'mark/neoid_with_json_field_support'