- Removed -fwritable-string

SKIPPED:
	psi/dornier2.c
	psi/ecbdriv.c
	psi/el734hp.c
	psi/libpsi.a
	psi/make_gen
	psi/makefile_linux
	psi/pimotor.c
	psi/pipiezo.c
	psi/sinqhttp.c
	psi/tcpdornier.c
	psi/velodornier.c

vector.h

@@ -90,4 +90,18 @@ MATRIX vectorCrossProduct(MATRIX v1, MATRIX v2);
  * @return A matrix as descibed above.
  */
 MATRIX matFromTwoVectors(MATRIX v1, MATRIX v2);
+/**
+ * calculate the nagle between two vectors
+ * @param v1 first vector
+ * @param v2 second vector
+ * @return angle in degree
+ */
+double angleBetween(MATRIX v1, MATRIX v2);
+
+/**
+ * scale the vector v with scale
+ * @param v The vector to scale
+ * @param scale the scaling factor apply
+ */
+void scaleVector(MATRIX v, double scale);
 #endif