README.md - fix `MaxLogLines` in config example

Merge pull request #8 from laurence-myers/ahk-v2

Fix missing description from input log, column values were all off by 1

Fix error when trying to append a row and the GUI has not been initialised ("Show on Startup" is off)

README.md: add info on version support and migration

Add Zero-clause BSD (0BSD) license

Unset globals when closing MIDI input

Update README for v2. Fix dead link.

Merge remote-tracking branch 'midi-v2/main'. Delete old files.

Make the number of log lines configurable in .ini, via setting `MaxLogLines`. Defaults to 10.

Rename `WriteConfig` ->`WriteConfigMidiDevice`

Fix duplicate GUIs; if one exists, just show it again

Refactor event handlers out of Gui.ahk

Restore `device` arg to MidiRules functions. Populate it from the global current device index.

- Store the MIDI device name in the ini file. Don't try opening the input if the device name doesn't match the stored name.