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From https://amas.psi.ch/OPAL/ticket/100 fix start of collimator and remove duplicated code i.e. use the Collimator object in CollimatorPhysics.cpp

in svn+ssh://savannah02.psi.ch/repos/opal/tests/trunk/Collimator 

 - Now we have to check again aginst FLUKA and mabe mcmpx (ToDo: Y. Bi)

 - In the collimator physics class the start of the collimator in floor coordinates is wrong
    is always 0.0 (ToDo: A. Adelmann)

- In the collimator physics class there is a duplocation of the actual collimator code, this needs to be elliminated (A. Adelmann)

- One has to check the CCollimator (ToDo: J. Yang)

energy spectrum, but something with the beams x,z,y coordinates is
still wrong. I guess it is a units problem in CoulombScat.

Check the test in opal-tests/Collimator

fix a case reported by Chris where we loose a particle which is still epsilon out of the field in z-direction

Add a new parameter OPYIELD (the outcome particle number per income particle) for STRIPPER element, opyield=2 for H2+; opyield=1 for H-

Number of impacts are not integrated anymore, now we have impacts per timestep
OpalData can be asked if a global Geometry is avaidable