Add changelog entry for 247
## Changelog
### Current
-2017-01-14
+2017-03-04
+* Added: Add `getProgramName` to `JCommander`, #247
* Added: Documentation for `listConverter` and `splitter`, #253, (@jeremysolarz)
* Fixed: Return right parameter name in exception, #227, (@jeremysolarz)
* Fixed: `JCommander#getParameters` returning nothing, #315, (@simon04)
