Consider lowering strictness of domain and path values

[CasperWA]

Raised as a comment in #34 by @ml-evs, we may want to loosen the strictness of how to pass in the values of domain and especially path.

At the moment one MUST prepend path with a / and MUST NOT append a / to the domain value.

Pro: Errors from passing incorrectly formatted values, which may be unclear, are avoided.
Con: This will lead to several, if not a lot of, prep-/appended / to determine the "correct" URL.

[CasperWA]

Suggestion: Use the Python "helper.py" introduced in #42 to conduct these checks quick and dirty, retrieving a complete URL in the shell script.