SEQ64 V2.1.4

Updated FL Studio compatibility mode, CC 115 for section boundaries. Now, the CC must be nonzero and be different from its previous value (or the first nonzero value in the sequence) in order to encode a section boundary.

Also removed the yield command being a candidate for encoding a delay of 1 tick. Evidently this command does more than that and was causing problems when it was automatically used.