Review Command-line options for Output/Report

[fabricereix]

Hurl can produce output to either stdout or a report file.

Output

We will use the terminology output, only for the one going to standard output.
The output can be written to a file with the option --output FILE.

We will have different types of output:

• Body of the last reponse (binary) as the default output (iso curl)
• Summary (text) using the option --summary
• JSON (text) using the option --json

Report

The options need to encapsulate both the type and the filename:

• HTML report with --html-report DIR
• JUnit XML report with --junit-report FILE

[fabricereix]

Alternative using report as prefix
--report-html DIR
--report-junit FILE

--report-text FILE could be even added in the future.

[fabricereix]

implemented in #351 and #342