IR_config_constants: added path to local data directory for parameter/input files

IR_image_tools: changed import of os for more flexibility
IR_image_tools: new function read_finger_info() reads intup files with parameters of the fingers as defined in the heat flux mapping
IR_image_tools: new function derive_wetted_area_per_module() calculates the wetted area given a numpy array with THEODOR results and mapping reference arrays as stored on the archive
downloadversionIRdata: small fixes to parameter structure in calls and messages, variation of example section
new input files in .\data: finger_infor_TDU.csv and finger_info_HHF.csv (used for wetted area calculation)