Online tool for OMR compliance

[Johann Eisner]

Alright. I have updated the OMR checks so that it allows both with "-1" and without.

Some checks have also been moved in an attempt to appear more logically positioned.

Finally, I have added an "OMR" option in the download menu, so that it is clear which file is OMR conform.

When I add a file to the OMR, I always remove the "-1" qualifier.