sha3 utilities: Print or check SHA3 digests

Command line that wraps sha3 lib from RustCrypto/hashes.
Commands and options are similar to the GNU Linux command shaXXXsum

Tasks

[X] Build skeleton based on man page of sha512;
[X] Create hash from file(s)
- cargo run -- -a 256 ./tests/data/f1.raw
- cargo run -- -a 512 ./tests/data/
[X] Create hash from pipe command
[X] Check an hash within a file
[X] Use multi-threads up to the number of cpu's
[ ] Tests with various targets
- [X] Development platform x86_64 GNU/Linux
- [X] Tests validity of hashes
[ ] Create binaries
- [X] Using cargo install sha3sum
Internationalisation i18n
- [X] English

Get help: sha3sum --help
Create for a file an hash Sha3-256 sha3sum -a 256 <path to file>
Create for all file in repository with Keccak512 sha3sum -a Keccak512 <path>
Create an hash for a text file using text mode sha3sum -a 384 -t <path to file>
Create for a file an hash Sha3-256 with output BSD style sha3sum -a 256 --tag <path to file>
Read SHA3 sums from the FILEs and check them sha3sum -c <path to file>