Add integration test to reproduce a race during cql_builder::build failure.
Task CPP-63. Deserialisation of errror messages.
For many new messages the error codes were deserialized and the results
were put into internal members.
Two public methods for getting these data from the error code is added. The error in get_unprepared_data is corrected.
Merge branch 'master' of https://github.com/jacekkasprzak/cpp-driver
Merge pull request #25 from mhfrantz/cql_builder_build_fail_race_v1

Add integration test to reproduce a race during cql_builder::build failure.
removing possible memory leaks in collecting the results from collections: set, map, list.
correction of some mistakes for the previous commit.
Merge pull request #26 from jacekkasprzak/memory_leaks

Memory leaks
Merge branch 'master' into dev
UUIDs with conversion to/from string
+ generation of UUIDS