Started encoding Isaac eaxmple
Merge branch 'master' into variants
Merge branch 'master' into variants
Merge branch 'master' into variants
MeiLib.parseSourceList()
Indent Isaac example
added test for parseSourceList()

fixed wrong assignment of MeiLib.JSON
MeiLib.parseAPPs() with test
MeiLib.createSingleVariantPathScore() with tests
Isaac measure 1-7
Isaac measures 8-14
Isaac measures 15-27
bigger font size for annotation
Test case for xml with processing instructions
Variant handling test app

read variant-mei, transform into single-variant-path mei, then display,
along with the transformed xml
exposed list of Vex.Flow.Stave objects in order to retrieve coordinates
some white spaces
removed mei: prefix from TC.Isaac.xml
reorganised arguments of createSingleVariantPathScore() and MeiLib.parseAPPs()
correct reference to argument in MeiLib.createSingleVariantPathScore