Update README.md
Initial code checking - This is just exploratory code. Currently non-functional.
Added some structure and incomplete output_square_icons and aspect_fit functions.
Seems to work when height constrained.
Largely untested but large complete basic functions.
Nearly working - icons OK, launchImages not so much.
Working!!! No commandline arguments next you have to edit the file but it is all there and seems to work.
Fixed! aspect_fit
Fix launch image size typo.
License under GPL v2 (same as Inkscape itself).

Note that I do not regard the software in this repo as a derivative
work of Inkscape as it dynamically accesses the publicly exposed
commandlines only and alternative SVG software or libraries could be
dropped in. However I have decided to license it in a similar manner
for the benefit of the community.
Added additional sizes for App Store and Review icons.
Added commands to do additional square icons I use in my app - Probably not needed by most people.