clarify disc fixes in whatsnew

Author: wholmgren

docs/sphinx/source/whatsnew/v0.1.0.txt

@@ -64,8 +64,10 @@ Testing
 Bug fixes
 ~~~~~~~~~
 
-* TODO: Fix DISC algorithm conditional evaluation (:issue:`6`)
-* TODO: Prevent DISC algorithm from modifying input zenith Series (:issue:`24`)
+* Fixed DISC algorithm bugs concerning 
+  modifying input zenith Series (:issue:`24`),
+  the ``Kt`` conditional evaluation (:issue:`6`),
+  and ignoring the input pressure (:issue:`25`).
 * Many more bug fixes were made, but you'll have to look at the detailed commit history.