Jacksum 1.7.0 released

customizable CRC algorithms due to the Rocksoft Model CRC Algorithm are supported now. Algorithms can be combined together and multiple hashes can be calculated at the same time. The korean standard HAS-160, the CRC of Bzip2, and are Tiger Tree Hashes are supported as well. New encodings (dec, oct, bin) have been introduced. Performance and code improvements, bug fixes and the documentation has been updated.