Version 2.3
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* Post DiFX-2.2
* no changes yet

Version 2.2
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* Post DiFX-2.1
pcList.pl:	properly treat case where FITS file has been created from
input files having different base names
* Tagged DiFX-2.2 on May 31, 2013

Version 2.1
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* Version for DiFX-2.1