call for testing new replace mode in Frescobaldi Midi Input

[Federico Bruni]

Hi folks

Dmitriy contributed a new feature for MIDI input in Frescobaldi v2 some 
months ago and I recently rebased his patch on master to make it work 
on Frescobaldi v3 and make sure the review process could start.
As Frescobaldi developers may not have a MIDI instrument to test it (I 
know Urs doesn't have one), I would welcome comments from anyone who 
can.

I've written a simple wiki page to set up a MIDI keyboard in Linux:
https://github.com/wbsoft/frescobaldi/wiki/MIDI-input-on-Linux

Pull request discussion is here:
https://github.com/wbsoft/frescobaldi/pull/1039

You should checkout the following branch:

git pull https://github.com/fedelibre/frescobaldi.git
git checkout midi-replace-mode-rebased

Instructions on how to run Frescobaldi from source is also on github 
wiki.

Remember that replace mode works only when the cursor has at least a 
note at the right.
When you want to enter the first music via MIDI input, Re-pitch mode 
should be unchecked.

Thanks
Federico