some fixes, don't remember them all

disable FUNDING.yml

minor fixes

catch some errors

--prepresize: new option to generate masks from scaled images

--resize: new mask option

--maskfft: new option

--fft updates

--fft: n3: diff=no

--fft updates

--fft: add usage info

enfuse_split(): do not suppress imfuse messages #10

--fft: new mask option

--finalmasklevel: removed

-f: short for --force