0.6.1 to develop

* Ability to enable JS parsing via `parseJS` toggle. (supports inline & referenced)
* Fix https://github.com/thybag/PJAX-Standalone/issues/18 (pdf's being loaded in by PJAX)
* Fix https://github.com/thybag/PJAX-Standalone/issues/19 (non-divs not being candidates for smart load)
* General refactoring