* Math Aggregation to support Sibling Aggs
* Fixing tests
* Deal with ResultSets
* including all var under params; updating docs
* Fixing bugs asscociated with blank Math aggs
* Adding aria props to elements
* Fixing aria labels; changing calculation label to bucket sript
* changing input to textarea
* Add compatability with percentiles; fix vars to be compatible with percentiles
* Adding comments
* Fixing typo in note