Mutil 1.76.7 released

CHANGES
- Fixed segfault when hashing multiple portions of the same file that are larger than the split size during --read-stdin
- Fixed segfault when hashing unreadable file
- Added --dst-offset option to copy to specific position in target
- Added --stripe-count option to set absolute/size-relative striping
- Added --print-src option to show src file instead of dst during --print-stats and --print-hash
- Added ability to copy/hash zero length subsets of files
- Removed --store-hash option since not viable given xattr performance
- Added some notes about CentOS/RHEL in INSTALL