update CHANGES

CHANGES

@@ -1,16 +1,24 @@
 # changes since the last releas
 
+  -- Added a load balance approach to Amr/AmrLevel.  The runtime
+     parameters for this is amr.loadbalance_with_workestimates and
+     amr.loadbalance_level0_int.  The latter is for single level
+     (i.e., amr.max_level=0) only.  For multi-level runs, load balance
+     is done during regrid and thus the load balance interval is
+     controlled by amr.regrid_int.  To use this approach, AmrLevel
+     derivative must has a StateData for work estimates and its index
+     is returned by virtual function int WorkEstType().
+
   -- MFIter now supports dynamic scheduling of OpenMP threads.  For
      example,
 
        for (MFIter mfi(mf, MFItInfo().SetDynamic(true).EnableTiling(tile_size);
             mfi.isValid(); ++mfi)
        { ... }
 
-  -- added EBFluxRegister to Src/EB for refluxing and
+  -- Added EBFluxRegister to Src/EB for refluxing and
      re-redistribution in EB.
 
-
   -- amrex.signal_handling = 1 is a new runtime parameter that can be
      used to control whether AMReX should handle signals like SIGSEGV
      etc.