[REFACTOR] Misc refactors, bug fixes and enhancements

- Ensure PHP 5.3 is supported
- Refactor assets to use protocol-less syntax
- Add new "top" layout to items assess demo
- Change items inline to use Questions API V2
- Update tabular question examples to use new css classnames
- Security check page doesn't work over SSL
- Support for loading site off a root domain or sub-directory
- Cannot copy LaTeX formula on formula editor demo
Merge remote-tracking branch 'origin/develop' into develop

* origin/develop:
  [BUG] Removed unnecessary template attribute in formula demo

mo