Implemented APP_AFTER_EXPORT_CALLBACK. Updated README.

Signed-off-by: Daniel (dmilith) Dettlaff <dmilith@verknowsys.com>
Better information in qt definition.

Signed-off-by: Daniel (dmilith) Dettlaff <dmilith@verknowsys.com>
Updated Thess definition to version 0.54.0

Signed-off-by: Daniel (dmilith) Dettlaff <dmilith@verknowsys.com>