More formatting.
Removes duplicate version from package.json
Ports Ruby digest-crc https://github.com/postmodern/digest-crc
Removes `block_length` that is never used.
Adds main file.
Adds shortcut methods.
Removes .gitmodules
Adds travis file.
Updates README.
Adds older version note.
Updates upgrading section.
Adds LICENSE file.
Updates package.json
1.0.0