Version 2.4
Tagged DiFX-2.4 on Nov 4, 2014

1.2
* Tagged as DiFX-2.4 on Nov 4, 2014

1.1
* Various developmental improvements between DiFX-2.1 and DiFX-2.2
* Tagged as DiFX-2.2 on May 31, 2013 

1.0 
* Initial version