fix measure timing and remaining utf8 - issues

The program now handles utf8 - characters that Finale uses. There may
be others yet lurking. Also fix the remaining timing issues.

A truly raw musicxml->mscx converted file now halves times and the resultant file
loads into mscore without error. Mind you that's only one file so far, but it's a
big one and it is has a number of quirky features that just seem to work.