[spatial] created new single-file module spatial importing spatialist
[spatial] created new single-file module spatial importing spatialist

this serves the purpose of still being able to use all spatial functionality
within pyroSAR without having to change all the script import statements and
also offering everything from within pyroSAR to the user

johntruckenbrodt/pyroSAR,johntruckenbrodt/pyroSAR