merge with constraints test

python/test/test-curve-constraints.py

@@ -3,7 +3,7 @@
 
 import unittest
 import curves
-from curves import curve_constraints
+from nd_curves import curve_constraints
 import numpy as np
 import pickle
 from numpy import array, isclose, array_equal

tests/test-curve-constraints.cpp

 #define BOOST_TEST_MODULE test_curve_constraints
 
-#include "curves/fwd.h"
-#include "curves/bezier_curve.h"
+#include "nd_curves/fwd.h"
+#include "nd_curves/bezier_curve.h"
 #include <boost/test/included/unit_test.hpp>
 
-using namespace curves;
+using namespace nd_curves;
 
 BOOST_AUTO_TEST_SUITE(BOOST_TEST_MODULE)