This marks completion of the arbitrary type field feature

Suggested by @xlxs4

Other changes: Add a couple more tests

Other changes:
Tweaked addNewParameter() in order for the IDs to be arbitrary (insertion
of already existing ID test incoming) according to suggestion by @kongr45gpen

Suggested by @xlxs41

Additional changes:
Fixed tests for parameter setting to accommodate the new way of parameter storage

Cause was an off-by-1 error in construction of the Parameter objects.
Minor changes to documentation

Also update some of the tests

Also update some of the tests

Looks like a test is breaking all of a sudden

Need to fix linker errors. Also updated documentation.

in order to make construction and adding more natural

Keep consistent the declaration of the execute functions in all child classes and change the scope of the execute function in the MemoryManagementService