Updating man page for recent changes
New feature: --pause and --resume to pause and resume the Greyhole daemon process.
Useful when you're in the middle of a big fsck and need Greyhole to stop using resources temporarily.
Merge pull request #83 from ebinans/master

Samba 4.0 support (64-bit binary only)
Improvement: Turn included files into symlinks on dev workstation
Complete Samba4 support in packages (rpm, deb)
Improvement: Better scrubbing (--checksums) on big pool
Will now stop fsck-ing, and work on MD5 for a while, once it has queued 1,000 MD5 checks. Will prevent the DB from getting filled with millions of pending tasks on big pools.
Improvement: great speed-up when listing spool directory.
Now using `find` instead of `ls -l`.