A few rules should support a true value for the rule to be applied to a predefined set of keywords

Fixes #218

`true` value applied to:

* requireSpaceAfterKeywords
* disallowSpaceAfterKeywords
* requireCurlyBraces
We should have a rule for that :P :P 

I did it to keep with the style of the other arrays. Changed it to just export the array directly.