The CDC connector was moved to its own repository and some changes to its
interface were made. Updated build scripts, deleted old connector and
fixed code to use new interfaces.
The test suite now compiles Jansson instead of letting the CDC connector
do it. This way the connector can be used as a very simple static library
with a dependency on the Jansson library.
The CDC connector now uses a non-blocking socket for the reads. This
allows the possibility of adding read timeouts.
Added some utility functions for dealing with GTIDs and delayed the
reading of the first row.
The static library cannot be linked to the Jansson static library by
CMake. This appears to be a limitation in CMake and a manual combination
of the two files would be required.
For the time being, the connector is only built as a shared library.
