When export of flow fields is enabled in the CMake,

the Mitopacq starts to produce also ID%02u_T%03lu_chromatinPoints.txt
files with positions of the chromatin molecules.
By tracking these, one can establish a GT flow field of the phantom
texture changes (- a subject of a tool coming in the next commit).

M    src/cell.cpp
M    src/cell_08_G2Phase.cpp