ENH : add xraylib-master recipe
ENH : add recipe for xraylib-3.1.0
ENH : added tiffile recipe
ENH : add vistrails-nikea
ENH : add upstream vistrails
ENH : strip v off of extracted version
ENH : added stable VisTrails recipe
ENH : added certifi
MNT : make sure version is a string
ENH : added lmfit recipes