v0.4.3

• Fix 2011 iMac Metal GPU patches (the combination of beta 10 and micropatcher v0.4.2 caused kernel panics). Also fix unpatch-kexts.sh so it fully removes the 2011 iMac Metal GPU patches. Thanks to Ausdauersportler for these fixes.
• Various README updates.
• patch-kexts.sh finally has automatic Mac model detection. (This feature is not yet documented in the README. The old command line options like --2010 and --2011 override the automatic model detection, so they still work -- in fact, they are still needed if a Big Sur installation is being patched on one Mac before it is run on another Mac.) Note that the --iMac option must still be specified manually for 2011 iMacs with Metal GPUs.