Tidying up
Merge pull request #56 from DDMAL/fonts

Pen/Brush stacks
Tidying up #defines
Removing tinyxml in emscripten makefile
Upgrade to pugixml 1.5 and fixing xml_declaration option
Fixing definition factor for higher precision layout calculation
Fixing ties and slurs positionning
Merge branch 'develop' of https://github.com/rism-ch/verovio into develop

Conflicts:
	src/svgdevicecontext.cpp