Working documentation

[arnoFleming]

Some code examples aren't working (e.g. faulty request body)

In order to improve adoption of our API, we should run (and fix) all code examples in our JS, Ruby and curl docs.

Implement

• Check and fix Ruby code examples Check (and fix) Ruby code examples #83,
• Check and fix JavaScript code examples Check (and fix) Javascript code examples #82,
• Check and fix Shell code examples Check (and fix) shell code examples #84
• Document the file name sanitizer Document file name sanitizer #91
• Add documentation to retrieve transfers's information Add documentation to retrieve transfers's information #81
• Unify response codes documentation Unify response codes documentation #90

and you're done :)