Round down onsets/offsets, test Duan's matching
Round down onsets/offsets, test Duan's matching

Test Duan's matching code (which uses greedy note matching) to compare
it to the graph based note matching. This also requires rounding down
note onset and offset times to 2 decimal places.

faroit/mir_eval,rabitt/mir_eval,craffel/mir_eval,bmcfee/mir_eval,faroit/mir_eval,rabitt/mir_eval,craffel/mir_eval,bmcfee/mir_eval