PSR-X Improvements

Everyone wants to make improvements to PSR-X this week, so im having a little go.

Instead of a total rewrite [like this](https://github.com/donquixote/psrx/tree/master/variations/paul-reduced) which is not only generally uneccessary, but this specific example is all about implementations, full of invalid notes, written like a blog post and generally is detrimental to the cause.

Instead, im going to address any issue that pops up with a reasonable tweak and at most a new rule or two.