v0.4.4

The same basic functionality but a lot better and with a lot more support (documentation, docker, dedicated website)

CHANGELOG

• updated docs to rust style
• added docs to lskatz.github.io/fasten
• some new unit tests
• --version is a new option for every script
• fasten_sort
• refactored the container and hosting it on github itself
• fasten_convert
• fasten_mutate
• Rewrote print!() so that it doesn't die on empty pipe