updates NumLimitsT.hh to use <limits> for numeric limits for int/float/double....

updates NumLimitsT.hh to use for numeric limits for int/float/double. update all incorrect uses of FLT_MIN/MAX that subsequently break

libs_required/ACG/Scenegraph/ManipulatorNode.cc

@@ -132,7 +132,7 @@ setup_cylinder_system(GLState& _state)
   double norm      = axis.norm();
   double angle;
 
-  if (norm > FLT_MIN)
+  if (norm > NumLimitsT<float>::min())
   {
     axis /= norm;
     if (scal_prod >  1.0) scal_prod =  1.0;