'pesterchum.ico' contains pc_chummy.png upscaled with Gimp to 16x16, 32x32, 64x64, 128x128, and 256x256. The previous icon only contained 16x16 and 32x32.
'pesterchum.icns' is pc_chummy.png upscaled to 512x512 with Gimp, converted to .icns with Pillow.
Should hopefully solve the awful anti-aliasing and interpolation artifacts some systems introduce when upscaling the icons.
- Removes files for package building to avoid PyInstaller package beviour.
- Removed __main__.py and run_as_subprocess.py for now, calling Python from path is not an acceptable way to mitigate the relative import issue.
- Renamed pyinstaller.py to pyinst.py to avoid the script being executed when "python -m PyInstaller" is ran.
- Adds Python 3.8 compatible command-line options to pyinst.py
