Show grid lanes

[OmegaPiSquared]

Melodics uses grid lanes to easily indicate where notes fall relative to the beat/time signature. Adding this feature in would make tracks easier to play and follow along with. This should also indicate bar lines

[rwtnb]

Hi, check-it out the latest release.
It's not quite there yet, but it's an improvement.

https://github.com/rwtnb/Drumsthesia/releases/tag/0.0.3