New Rules: disallowOperatorBeforeLineBreak

Closes gh-511
Sorry for the late response, we were considering other options, it seems 

> Add dot as binary operator and rename the rule in 2.0 by replacing word "Operators" to something like "Tokens", we're iterating on tokens here anyhow

Is our best bet, in other words, will merge this pretty soon, after that, we could add this rule to the `wikimedia` preset