Interpreter CLI
Currently, the command line interface of the scrapelect interpreter is very
simple. The way to invoke the interpreter is:
$ scrapelect <scrp_path> <url>
where scrp_path is the path to the .scrp file, and url is a qualified,
absolute URL. That is, url must start in a scheme (like https:// or file://).
Currently, scrapelect supports the following URL schemes:
http://,https://: a "typical" URL to a web page.file://: read a file on the local device, without using the internet.