Integrate Werners & Jans double branch

Move from float to double
Further suggestions for float -> double move
Moved Tools2D from float to double
More suggestions for float->double move from Gui subdirectory
Changes to FEM constraint visuals for float->double move
Suggested changes for float -> double move
Suggestions for Part module moving float -> double

src/Mod/Cam/App/AppCamPy.cpp

@@ -354,7 +354,7 @@ static PyObject * best_fit_coarse(PyObject *self, PyObject *args)
 
 static PyObject * offset(PyObject *self,PyObject *args)
 {
-    float offset;
+    double offset;
     PyObject *pcObj;
     if (!PyArg_ParseTuple(args, "O!f",&(TopoShapePy::Type), &pcObj,&offset ))
         return NULL;