title: Jbrowse-libpng not found
body: <p>For jbrowse I use fink to install libpng, but I still can't get it working.  It spits out this error message:</p>
  
  <blockquote>
    <p>configure: error: libpng not found. Please install libpng and try
    again. Or if it is already installed (e.g. in /usr/X11), pass the
    include and link paths to configure like so: ./configure
    CXXFLAGS=-I/usr/X11/include LDFLAGS=-L/usr/X11/lib
    + cd ../..
    + set -x
    + bin/wig-to-json.pl --key 'Image - volvox_microarray.wig' --wig docs/tutorial/data_files/volvox_microarray.wig --category
    'Pre-generated images' --out sample_data/json/volvox</p>
  </blockquote>
  
  <p>I don't really know what this error message means and when I type in the terminal</p>
  
  <blockquote>
    <p>./configure CXXFLAGS=-I/usr/X11/include LDFLAGS=-L/usr/X11/lib</p>
  </blockquote>
  
  <p>It gives me an error that ./configure: No such file or directory.</p>
  
  <p>I am a Novice at command line. Someone please help!</p>