Summary of changes:
- Changes contributed by Jon Hand based upon original changes made by
  Achim Geissler.
- Relocation of electrical power common blocks into power.h as a code
  tidy. Correct typing of variables in ENETSIMP.
- These changes have no impact on simulation predictions.

Testing:
- Visual difference of all changes
- Syntax check of both master and variant
- Ran tester.pl master vs variant with no reported differences.