Merge branch 'refs/heads/gui'
test
Revert "test"

This reverts commit b4ee587e554ac5f790b38f4194c4d9e907a2c26d.
* Combine enums for MIDI messages(event types).
* Add option DOC option to CMake
Merge branch 'refs/heads/master' into gui
Merge branch 'master' of github.com:prozum/midiogre