Finally recommitting clee's patch from r518 to allow 64-bit mp4 files that can hold...

Finally recommitting clee's patch from r518 to allow 64-bit mp4 files that can hold more than 4 gigs... controlled by a boolean called job->largeFileSize and enabled from the cli with -4 or --large-file. Note that this breaks compatibility with stuff like the iPod, AppleTV, PS3 (I think), etc...so it is off by default.

Also converted a few stray hard tabs into soft tabs.

git-svn-id: svn://localhost/HandBrake/trunk@618 b64f7644-9d1e-0410-96f1-a4d463321fa5