1) Bug removed from the simulation of optical photons with
the option "APDcellsEffectRequested" -- namely, when any
simulated photon hit a given APD cell, the cell became "blind"
to any other photon, irrespective of the arrival time of the
next photon. However, we need that if the "second" photon
(simulated at later phase) enters the APD cell before the
"first" one, that the time of photon arrival changes to the
earlierst photon.
2) A new keyword "sampleID ..." (defining which volume is the
sample volume) was added to the musrSimAna. The manual
was updated accordingly.