This class is instanciated by a cell object, it contains the functions required to determine if the cell exist, and in which part of the cell cycle it lives
Function that find phases for each image it can be called by a timer, which explains the particular structure
Functions that locks everything before running find_phases
THIS FUNCTION MUST DISAPPEAR SINCE THE PHASES MODULE HAS BEEN REORGANIZED FOR THE MOMENT IT RETURNS A BINDING TO THE IS_CELL MODULE