Add Content from the old Wiki Taken from http://dev.pointclouds.org/projects/pcl/wiki. Reformated using: sed 's#</pre>#```#g;s/<pre>/```/g;s/@/`/g;s/h3./###/g;s/h2./##/g;s/h1./##/g;s/h1./#/g'

jspricke committed Sep 5, 2013