autotest: added a test script for wind generation

this makes it easier to experiment

Tools/autotest/pysim/testwind.py

@@ -0,0 +1,16 @@
+#!/usr/bin/env python
+# simple test of wind generation code
+
+import util, euclid, time, random
+
+wind = util.Wind('3,90,0.1')
+
+t0 = time.time()
+velocity = euclid.Vector3(0,0,0)
+
+t = 0
+deltat = 0.01
+
+while t < 60:
+    print("%.4f %f" % (t, wind.accel(velocity, deltat=deltat).magnitude()))
+    t += deltat