move host transport events to separate template and allow without midi input

[dromer]

Also midi ports on the [midirealtimein] object count 0-base.

Only odd thing is that with clock ticks we're receiving some additional number (frame count?) ->

> 248 752000 
> 248 753000 
> 252 0 
> 251 0 
> 248 754000 
> 248 755000 
> 248 756000 
> 248 757000 
> 248 758000 

And I can't figure out where this is coming from 🤔

This resolves #200