Update README.md
remove bundled cqlengine
drop custom batch operator and some settings
branch todo file
removing pinterest example from travis
fix travis manifest
use cqlengine sync_table
fix cassandra trim
don't test unsupported cassandra trim
update todo
cleanup dropped settings
re enable pin example app
split update_diff writes and deletes in two batches
remove pin example from travis again
drop test keyspace before running tests
use absolute path for cqlsh
pipe command to cqlsh
pipe command to cqlsh
update travis back
allow users to send kw to cassandra Cluster class