Update cql_connection_impl.hpp
Update cql_session_impl.hpp
Update cql_trashcan.hpp
Update cql_session_impl.cpp
Update cql_trashcan.cpp
Merge pull request #36 from stanislav-podlesny-ncbi/master

Memory fixes in cql_connection_impl, some small refactoring
Update cql_connection_impl.hpp
Merge pull request #37 from stanislav-podlesny-ncbi/master

Dangling pointer fix in cql_connection_impl.hpp
Merge branch 'dev'

Conflicts:
	include/cql/internal/cql_connection_impl.hpp
Merge branch 'master' into dev