adding failing tests for empty container column saving
adding update method to model docs
separating inserts, updates, column deletes and query value logic
updating update method to only issue set statements for modified rows and counters
fixing container column bug that would write insert empty container columns
adding tests around empty container insert bug fix
adding update method to model
updating changelog
fixing update errors
adding tests around model updates
adding queryset updates and supporting tests
removing empty update exception
adding docs for queryset update
Merge branch 'master' into updates
adding BigInt to changelog
Merge branch 'master' into updates
adding dokai's time uuid update to changelog
Merge pull request #121 from cqlengine/updates

Updates