Basic (working) counter column.  You can add and subtract values.  You must use CounterModel when using a CounterColumn.
Merge branch 'master' of https://github.com/bdeggleston/cqlengine
Custom TTL and timestamp information can be passed in on save.
Merge branch 'master' of github.com:bdeggleston/cqlengine
Merge branch 'master' into ttl
setup has retry_connect, which will retry connect on next execute if Cassandra was down during setup.
Merge branch 'master' into delayed-connect
reorder session check in execute to allow lazy connect
Merge branch 'master' into delayed-connect
merge master to delayed-connect
fixed docs
Merge branch 'master' of github.com:cqlengine/cqlengine
added clustering_order
clustering keys example
clustering example
examples, plural
syncing examples
fixed code block
logging queries
Merge remote-tracking branch 'cqlengine/master'

Conflicts:
	cqlengine/columns.py
	cqlengine/connection.py
	cqlengine/models.py
	cqlengine/query.py