Convert Publish_spGetChildrenInCategoryPaging to be less gross

Based on complaints about performance issues with this proc, I re structured the dynamic SQL to take parameters, where it could.
I also adjusted the paging to be done with a Common Table Expression and ROW_NUMBER.
StyleCop integration
Update copyrights
Version 5.8.6
Merge pull request #8 from bdukes/master

Publish 5.8.6