CLI: Removes --vfr command line option. --detelecine now drops frames by default...

CLI: Removes --vfr command line option. --detelecine now drops frames by default. To regress to the old behavior of not dropping duplicate frames in detelecine, and only reweaving them so they're progressive, specify a frame rate ( -r 29.97 would be the one that makes sense). This is because the "Same as source" FPS method employed when the user doesn't specify a framerate is inherently variable, as it passes through the source's frame durations instead of smoothing them to a constant rate.

git-svn-id: svn://localhost/HandBrake/trunk@1773 b64f7644-9d1e-0410-96f1-a4d463321fa5