updated

changelog.md

 Changes in tpcclib
 ==================
 
-## version 0.6.20 (2018-05-14, under development)
+## version 0.6.20 (2018-05-16)
 
-- Imported applications fit_feng, lhsol, imglhk3, and imgmove.
+- Application absscal updated to work with new GEMS files.
+- Imported applications fit_feng, fit_wcdf, lhsol, imglhk3, and imgmove.
 - Added application tac4frpl, replacing old application dft2frpl.
 - Added application conv1tcm in v2 for simulation and testing.
 - Added application liverpv.
 - Added applications e63mreg and e63mdel in v1.
-- Added colvolve1D() and its preprocessing functions in libtpccm in v2.
-- Added function csvIsRegular() in libtpccsv in v2.
-- Added functions qrLH() and bvls() in libtpclinopt.c in v2 and in libtpcmodel in v1.
-- Added function parFreeNr() in v1 and v2, and aicSS in v2.
 - Applications tacformat and parformat, and functions tacWrite() and parWrite() in v2, can write 
   Excel compatible XML format.
-- Updated and imported a few functions in libtpcmisc in v1 based on v2.
+- Added option -focus to application imgprofi.
 - Changes in ASCII file reading functions in both v1 and v2.
 - Fixed bug in dftValidNr() in v1.
 - Fixed bug in imgftac with option -integral.
-- Added option -focus to application imgprofi.
-- Application absscal can read isotope from GEMS file header.
+- Added colvolve1D() in libtpccm in v2.
+- Added functions qrLH() and bvls() in libtpclinopt.c in v2 and in libtpcmodel in v1.
+- Added function parFreeNr() in v1 and v2, and aicSS in v2.
 - Improvements in libtpcnlopt in v2.
 
 ## version 0.6.19 (2018-02-28)