When we animate from a use, we should not consider its matrix because the matrix of the destination group is apply to the whole <svg:use> include its matrix. Seperate scale tween into three functions to reduce its size.

SUBDIRS = src include tools examples inkscape
pkgconfigdir = $(libdir)/pkgconfig
pkgconfig_DATA = libmbfly.pc
EXTRA_DIST = libmbfly.pc.in Doxyfile README.h

if NODEJS
  SUBDIRS += nodejs
endif