Unify units in Elements and Input / Output

According to #45 and #227 the units of OPAL-T and OPAL-Cycl should be unified.

The following units should be used:

• meter
• second
• MeV or eV
• Tesla
• MV

For the full list see http://amas.web.psi.ch/opal/Documentation/master/OPAL_Manual.html#sec.conventions.units

Some elements are already fixed. This issue (as discussed with @gsell) should keep track of elements that are not yet updated. If an element is missing, please add it to the list.

Developers that fixed an element should mark it here:

• Bend2D - no fixing needed
• BeamStripping (!368 (merged), !479 (merged))
• CCollimator (!368 (merged), !479 (merged))
• Corrector deleted in !390 (merged)
• Cyclotron (!632 (merged))
• CyclotronValley deleted in !218 (merged)
• Degrader
• Drift
• FlexibleCollimator
• Monitor
• Multipole
• MultipoleTBase
• MultipoleTCurvedConstRadius
• MultipoleTCurvedVarRadius
• MultipoleT (!643 (merged))
• MultipoleTStraight
• Offset
• ParallelPlate deleted in !390 (merged)
• PluginElement (!368 (merged))
• Probe (!368 (merged), !479 (merged))
• RBend3D - no fixing needed
• RBend - no fixing needed
• RFCavity (!619 (merged))
• RFQuadrupole deleted in !390 (merged)
• Ring (!632 (merged), !643 (merged))
• SBend3D - no fixing needed
• SBend - no fixing needed
• ScalingFFAMagnet (!643 (merged))
• SectorFieldMapComponent deleted in !230 (merged)
• Septum (!368 (merged), !479 (merged))
• Solenoid
• Source - no fixing needed
• Stripper (!368 (merged), !479 (merged))
• TravelingWave
• TrimCoil
• VariableRFCavityFringeField (!643 (merged))
• VariableRFCavity (!643 (merged))
• VerticalFFAMagnet (!643 (merged))

Input / Output

• ID1 and ID2 in stat file and track file
• Field Maps (!506 (merged))