[almighty] CLI Documentation

[Thomas Mäder]

Hi folks,

It has been requested that we document our command line interface. To 
me, however it's not quite clear in what form we should do that: 
technically, the cli is self-documenting. If you do "alm-cli --help", it 
will give you a list of possible commands and options. The alm-cli 
command is mentioned in the developer set up section on github. Do we 
believe this is sufficient? What else is necessary?

The same question applies to the REST API

/Thomas