Document difference between command line and Ruby implementation #433
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This change to the project scope clarifies that "advanced" usage of this project will require using Ruby.
It would allow us to close issues as out of scope:
bin
/command line #379Also it will allow us to accept a change to the README which would simplify the recommended use case (command line) while allowing further, advanced discussion in a separate file or wiki like https://github.com/gjtorikian/html-proofer/wiki/Using-HTMLProofer-From-Ruby-and-Travis