Implemented establishing connection with database
Began working on Python mapping core
Implemented session factory
Implemented keyspace manager
Implemented columnfamily manager
Implemented descriptor factory
Changed columns names are persisted in underscore manner
Implemented module scanner
Implemented model metaclass
Implemented model metadata
Began working on example
Implemented engine
Tidied up source code; began gluing components
Implemented binding engine to model
Test refactoring
Merge branch 'python-core'