Log Message:
Update to 20121201.  Changes:

abc2midi, yaps, abc2abc: The time signature C| or c| is now
interpreted as 2/2 instead of 4/4.

Added Chinese character support in lyrics.

abc2midi extension: abc2midi treats Xn the same way as Zn

bug fix: abc2abc truncated the voice ids when it encounters the first
invalid character without giving any warning.

bug fix: abc2midi was unable to trill or roll tied notes.