Log Message:
Update ruby-launchy to 2.4.3.

## Version 2.4.3 - 2014-11-03
* Update documentation - \ 
<https://github.com/copiousfreetime/launchy/pull/81> - supremebeing7
* Fix launching of `exo-open` for XFCE - \ 
<https://github.com/copiousfreetime/launchy/issues/82> - dsandstrom
* Add iceweasel as a fallback browser - \ 
<https://github.com/copiousfreetime/launchy/pull/92> -  jackturnbull
* Reopen $stderr in really bad situation - \ 
<https://github.com/copiousfreetime/launchy/pull/77> - infertux