proof of concept for using pkg-config in place of Magick-config on debian based systems
typo in pkg-config CPPFLAGS.  Magick-config uses --cflags here.  (See https://gist.github.com/theschoolmaster/0b14516537072382e08d for a gist of a current Magick-config as built from ImageMagick source on debian jessie/sid)
Merge pull request #129 from theschoolmaster/master

proof of concept for using pkg-config in place of Magick-config on debian based systems