Don't truncate RF/QP values down to integers when displaying job config. Still needs...

Don't truncate RF/QP values down to integers when displaying job config. Still needs to be restructured for encoders other than x264, but I wanted to get this minor change in now so I don't forget and because it won't break any patches to work.c.

git-svn-id: svn://localhost/HandBrake/trunk@2175 b64f7644-9d1e-0410-96f1-a4d463321fa5