v0.5.0

First of all, correction to what I said previously in v0.4.0 release note: soft-float version does not work and I have no idea why and also no way to debug it. So, don't expect fe will work on any old devices with firmwares before 5.16.3. If you really want to try and stuck at a blank screen, try tapping the lower left corner (where the exit button should be) first, if it doesn't exit, then long press the power button for 30s.

I expect koplugin will work though, as the hf/sf problems doesn't seem like affecting bokai.

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Added self-update, now v0.5.0 is the last time one needs to manually copy paste this plugin into devices.

Also brushed up the option text in koplugin, now it should be clearer what each item really means.

Full Changelog: v0.4.0...v0.5.0