Update styles to match rule modifications

Notes on the cirosantilli style:

* Parameters have been added to relevant rules to match the style guide
* All remaining rules have been included in an attempt to simplify the style
  file. Previously excluded rules have either:
  * been removed in favor of parameters
  * don't matter (e.g. only fire on non-atx style headers)
  * probably shouldn't have been excluded (MD002 - first header should be a h1
    seem to be implied by "don't skip header levels")