Doing some refactorings to improve the codebase before starting to work
on #146
Extracting variable management from
OPMInZoomedProcessExecutableInstance.
More refactorings before starting work on #146. The code is starting to
look much better, and found a couple of bugs in the way.
* Arguments and parameters are now stored in lowercase everywhere, so
casing them does not do any difference.
Working version where parameters are inferred using the name of the
object that is connected to the process that consumes/yields the
parameters. Working on #146