update changes

Author: zingale

CHANGES

@@ -1,15 +1,11 @@
-# changes since the last release
+# 19.05
 
   -- The aprox21 network was missing the analytic Jacobian term for
      the derivative of He4 with respect to Ni56. This is fixed. (#175)
 
   -- The numerical Jacobian module, used by the BS and VBDF integrators
      had some wrong scalings.  These have now been fixed (#179, #180)
 
-# 19.03
-
-# 19.02
-
 # 19.01
 
  -- the docs are now automatically build from the sphinx source