Update of Mozart KV387

Rename files as requested by Maurizio Tomasi
Update of HaydnFJ HOB XVI:27
Update of HaydnFJ HOB XVI:28
convert to utf8 encoding
convert to utf-8 encoding only, no semantic changes
convert to utf-8 encoding only, no semantic changes
convert to utf-8 encoding only, no semantic changes
Merged two headers into a single header
No semantics changes
Add footer to mutopia headers to identify Mutopia id
Fix footer, mutopiapoet, mutopiacomposer
Add mutopiafooter to fix load. No semantic changes.
Add mutopiafooter to fix load. No semantic changes.
Add mutopiafooter,mutopiatitle to fix load. No semantic changes.
Convert lyrics to utf-8
Repair footer to correct Mutopia id (was 1, now 14)
Added dates to Farinel, Hullah, Yaniewicz
Corrected mutopiacomposer to HandelGF
Add mutopiacomposer='AbtF' to footer
Add mutopiacomposer = "AdamsS" to correct DB load
Set mutopiacomposer to Anonymous
Added moreinfo note regarding false attribution