Added first version of the new backward tracking method. It is now possible to use interpolation methods as well.

The warnings on loading the old interim file have been disabled to not
distract the user.

If an adjusted interim file exists, the current date and time is appended
to the filename.

Integrated the empiric_offset and empiric_drift parameter of the float, Changed copy offsets layout.

The etopo file must be downloaded separately and linked as parameter
etopo in the files section in artoa.ini file.

Updated versioning system. Artoa now checks if your loaded interim file is compatible to the artoa version you are using.