README update
Makefile, header tweaks
more Makefile and structure tweaks
remove old font2openvg
update README with updated build info
remove go build as default target
Merge commit '2b3132b0ed39b42c90e3079b501b8f989d3f20e5'

Conflicts:
	Makefile
	README.md
	fontinfo.h
	shapes.h