[Eventsgen] Events and FSM generation from scxml description

.gitignore

scripts/eventgen/README.md

scripts/eventgen/eventgen.py

scripts/generators/README.md

scripts/generators/eventgen.py

scripts/generators/fsmgen.py

scripts/generators/genutils.py

scripts/generators/templates/EventStrings.cpp.template

scripts/generators/templates/Events.h.template

scripts/generators/templates/FSMController.cpp.template

scripts/generators/templates/FSMController.h.template

scripts/generators/templates/FSMData.h.template

scripts/generators/templates/Topics.h.template

...s/generators/templates/state_function_definition.template

scripts/generators/templates/test.cpp.template