preparing for release

changelog.md

@@ -5,11 +5,12 @@ This is a concise list of changes; commit messages can be found in the
 [Git repository](https://gitlab.utu.fi/vesoik/tpcclib.git).
 
 
-## version 0.7.3 (under development, 2019-09-17)
+## version 0.7.3 (2019-09-19)
 
 - Added applications parmean, svar4tac, and imgfrdyn.
 - Application dftweigh is deprecated. Rewritten and renamed to tacweigh.
 - Added library functions and tests.
+- Added optional functionalities to a few applications.
 - Removed some deprecated code.
 - Test data and scripts are removed from build folder with make clean. 
 - Updated user info in some applications and function documentations.