Improve the CLI

[achille-roussel]

Here are a couple of cool stuff we can do with it:

$ ./ksuid -n 4
0o35Ftbt8TXsOUZ1D91tLT5zUsw
0o35FtjHPXAtq4hyGBgVQL6Wnox
0o35FujDQPUHsiNBuXlENVvboom
0o35FqevPFTaoKFEXyACHjKPn2o

$ ./ksuid -f template -t '{{ .Payload }}' -v $(./ksuid -n 3)
0o36QVc0DzOCJQ9jlTWSyvze5tW: 5A3585D86498DF0DE97F9F4F9C0262F6
0o36QZIqT8UISV2sgDzXrWLtq5p: D37BEC28DCFE5F04591666434EC97E91
0o36QUY87vKXy1ELx83Qq10dn6F: 374CCA83A1BA8F23D689FE414655DFEF

$ ./ksuid -f time $(./ksuid)
2017-05-16 00:20:33 -0700 PDT

$ ./ksuid -f raw $(./ksuid)
�ZOc��f�V�����w

$ ./ksuid -f template -t '{{ .Time }}: {{ .Payload }}' $(./ksuid)
2017-05-16 00:20:12 -0700 PDT: A137C5E11DBD6EF9907A2D62C6A0ADEB

Let me know what you think.

[rbranson]

Nice!