handle TimeoutError
support cas operations
use couchbase 1.1.0
handle CouchbaseError
handle exceptions in delete operations
use numpy for random operations
break compatibility with Python 2.6
return result of operation

it's required by async implementation
don't pass the same arguments everywhere
check time_to_stop condition in loop statement
generate and run batch separately
check reporting condition inside of reporter
use sid as class property
use standard random for some cases
upgrade to pylibcouchbase 1.2.0
enable batch operation pipeline for single worker
log NotFoundError exceptions
add requirements.txt
allow to override query params
log method that throws exception