[test] (bug-change:minor) Removed unused typedef.
[math] (bug-fix:major) It seems that the hunt/locate functions from NR3 doesn't work (e.g. try with P0=(0,0),P1=(1,0.5),P2=(2,2),P3=(3,1.5)). Replace them with a more naive approach (i.e., a sequential search)
[math] (bug-fix:minor) Wrong order for linear interpolators.
[math] (new:major) Initial commit for cubic spline interpolator class (needs further tests).