Updated to include mention of latest pull request

doc/ACKNOWLEDGEMENTS.md

@@ -73,5 +73,7 @@ is acknowledged and greatly appreciated:
  * Sam James - provided fix for number.c build issue caused by missing stddef.h
  * Jakub Wilk <jwilk@jwilk.net> - corrected README encoding
  * [ikasty](https://github.com/ikasty) - added relative filename display to "`--watchfd`"
+ * [Michael Weiß](https://github.com/quitschbo) - corrected behaviour when not attached to a terminal
+ * [christoph-zededa](https://github.com/christoph-zededa) - provided OS X suppot for "`--watchfd`"
 
 ---

doc/NEWS.md

@@ -1,7 +1,8 @@
 UNRELEASED
  * dropped: support for Red Hat Enterprise Linux and its derivatives has been dropped; removed the RPM spec file, and will no longer build binaries
  * fix: correction to `pv_in_foreground()` to behave as its comment block says it should, when not on a terminal - corrects [GH#19 "No output in Arch Linux initcpio after 1.6.6"](https://github.com/a-j-wood/pv/issues/19), [GH#55 "pv Stopped Working in the Background"](https://github.com/a-j-wood/pv/issues/55) (pull request [#64](https://github.com/a-j-wood/pv/pull/64) supplied by [Michael Weiß](https://github.com/quitschbo))
- * feature: the "`--watchfd`" option will now show relative filenames, if they are under the current directory (pull request [#66]() supplied by [ikasty](https://github.com/ikasty))
+ * feature: the "`--watchfd`" option will now show relative filenames, if they are under the current directory (pull request [#66](https://github.com/a-j-wood/pv/pull/66) supplied by [ikasty](https://github.com/ikasty))
+ * feature: the "`--watchfd`" option is now available on OS X (pull request [#60](https://github.com/a-j-wood/pv/pull/60) supplied by [christoph-zededa](https://github.com/christoph-zededa))
  * docs: moved all open issues into GitHub and updated the TODO list
  * docs: renamed README to README.md and altered it to Markdown format
  * docs: moved contributors from the README to docs/ACKNOWLEDGEMENTS.md