Cli

[francozappa]

@remmihsorp please go ahead from here and then when we are ready we push to master

TODO:

• [x] add cli tests to travis and update its conf
• [x] create a basic cli doc in the docs
• [x] update versions and CHANGELOG.md
• [x] generate a man page for mcps

[francozappa]

@remmihsorp any updates for this branch?

[aporan]

• [x] i looked around, perhaps, the easiest way would be to provide the man page with the package. Similar to nose: noseman.

Done.

[francozappa]

@remmihsorp, we have to remember to generate a usage message (i.e. simular to rustup) when mcps is invoked without arguments.