adding callbacks support to BatchQuery
removing `batch` from the list of args passed to BatchQuery callbacks
switching to list as BatchQuery callbacks collection + add_callback() API
cleaning up batch callback docs
fixed issue with timestamp and DST
timestamp as a long wasn't being assigned
Removed cql monkey patch in favour of Quoter to allow Bytes support
Added a test to show the problem with Text values and '0x' prefix
updating changelog and version
Check number of elements in collections.
Fix test layout.
Add support for simple table properties.