* Add top-level 'actionSummary' template variable that renders a markdown list of action results
* Add individual action result/data, in the same structure as rules, under the top-level 'actions' template variable
* Implement interfaces for template parts
* Refactor Action constructor to take an object for runtime options (cleaner, more extensible)
* Refactor subreddit resource and snoowraputils content rendering and organization to use objects of optional data rather than required arguments
* Make almost all data optional and only parse/render if included
* Move rule results parsing/formatting into own function
* Refactor footer render to use renderContent (DRY)
* Add some requested template data #104
* {{item.subreddit}} #87
* {{check}} #87
* Updated templating documentation
