Feature: (S)FTP integration

[cerus]

Implement (S)FTP to upload / delete artifacts. The only way to upload artifacts at the moment is through the use of external commands, like Linux's scp, and that's not really great.

I would add an ftp section to the config (like the ssh section) with an instructions array (upload file, delete file, ..). The Destination.Order enum would have to be changed too. The Gson type adapters will also have to be changed and a new type adapter for the ftp section needs to be added.

Please comment if you would like to work on this.

[erickluz]

I would like to work on this! What do you think about the Apache Mina as lib for to do this?

[cerus]

Sure, go ahead! Please make sure to follow the contribution guidelines :)
(In regards to rule 1: you don't have to create a new issue since this one already exists.)

[cerus]

Any updates?

[erickluz]

I'm in development!

What do you think of the current SCP resource remaining on the system?