Continuous signals have less priority than inputs. Therefore before
evaluating them it is mandatory to check the presence of messages in the
input queue of the SDL process. User has to provide the function that
checks the queue. TASTE uses POHIC API for that.

- an extra "end if" was generated in some cases when using continuous
  signals
- when generating the simulation script, lower the process name as gnat
  generates only lowercase .o files

Don't do anything at elaboration

the Makefile.Python would not regenerate dataview-uniq.h if the file is
already there, but for the python backends we must not have the asn1scc
prefixes

Was missing elsif statements

...to support properly state aggregation and composition.
Clustering of graphs has to be handled manually because of graphviz
limitations.

in Helper.py, the propagate_inputs function was not adequate in the case
of state aggregations