Added testing mode support for cell centres reporting, to utilize

calculation of MSD curves.

New flag "report for 2D MSD analysis = 1" was introduced into the testing section.
M    config/config-middleVOI-lowSNR.ini
M    config/config-smallVOI-highSNR.ini
M    config/config-711extVOI-highSNR.ini
M    config/config-smallVOI-lowSNR.ini
M    config/config-middleVOI-highSNR.ini


Cell::ScmRenderCellIntoMask() has new parameter: a time value to possibly report.
M    src/cell.h
M    src/cellScm.cpp

Adjusted lines whereever the above function is used.
M    src/cell.cpp
M    src/cell_00_Samplephase.cpp
M    src/cell_01_Prophase.cpp
M    src/cell_02_Metaphase.cpp
M    src/cell_03_Anaphase.cpp
M    src/cell_04_Telophase.cpp
M    src/cell_05_Cytokinesis.cpp
M    src/cell_06_G1Phase.cpp
M    src/cell_07_SPhase.cpp
M    src/cell_08_G2Phase.cpp