Update Autoloading Documentation
Update Autoloading Documentation

WordPress has updated since the `delete`/`add` dance for handling options updates was standard practice. `update_option()` now supports an optional third parameter for toggling autoload and should be used as the preferred method for controlling options pulled into memory.

Fixes #201

daveross/Engineering-Best-Practices,ericmann/Engineering-Best-Practices,TheLastCicada/Engineering-Best-Practices,daveross/Engineering-Best-Practices,ericmann/Engineering-Best-Practices,TheLastCicada/Engineering-Best-Practices,TheLastCicada/Engineering-Best-Practices,rclilly/Engineering-Best-Practices,ericmann/Engineering-Best-Practices,daveross/Engineering-Best-Practices,10up/Engineering-Best-Practices,10up/Engineering-Best-Practices,rclilly/Engineering-Best-Practices,10up/Engineering-Best-Practices,rclilly/Engineering-Best-Practices