Add basic usage with some options to use and example commands

[acloudiator]

Improve the Usage section.
-Fulvio

[mauriciovasquezbernal]

Could somebody clarify what is this issue about?

[acloudiator]

Only @frisso can

[mauriciovasquezbernal]

@frisso can this be closed?

[frisso]

Yes, we can close this.