[#1954] Merge WIP
[#1954] Merge to 5611, Fuse port still a WIP
[#1954] merged everything but SHA256: fuse, ichmod -r performance improvement, other bug fixes
[#1954] hashing class implemented for md5 and sha256 for iput and iget
[#1954] SHA256 hashing added, including usage of hash scheme negoations and hasher class
[#1954] fixes for fuse and checksum due to issues found during testing
[#1954] merged up to 5680
[#1954] changes to fuse for build purposes after a rebase