Waveform digi timing

Complete rewrite of the waveform digitization timing. Properly put all code that does work into the Waveform Digi Tool and returned the Alg.execute() functions to const. Refactorizing the code also allows the Calorimeter and Scintillator digitization to share the same Tool rather than re-writing the digitization code twice.

Old behavior can be recovered by setting job option.

This is a release candidate for mc24.