[feature request] Option to suppress some checks

[ideasman42]

I'm using a checking utility that runs various checks...

• bytecode-compile
• checkdoc
• package-lint
• relint
• melpazoid

The problem with this is melpazoid is running some of these checks, causing reports to be generated multiple times.
Could melpazoid take arguments to skip some checks?

I'm not sure which calling convention is preferred, but this could work:

(melpazoid :check-doc nil :byte-compile nil)

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If you think this is acceptable, I could create a PR to implement this.

[riscy]

Thanks!

Probably relates to #42

I'd definitely be up for a PR that allowed only e.g. the relint checks to run when using melpazoid.el inside Emacs.

[ideasman42]

Submitted: #47.