Add Markdown Readme for display on GitHub [skip ci]
Merge pull request #99 from Lukas-W/stable-0.4

Add Markdown Readme for display on GitHub
Organic: fixed tooltips for knobs that do not need a unit

For some knobs it doesn't make sense to use a percentage sign as unit.

Thanks to Tobiasz Karoń for pointing out this issue.
More artwork updates. New LCD numbers, triple osc artwork, lots of icons, some colour changes.
More new icons, triple osc artwork, scrollbars, etc.