Initial exploration; Minor style changes.

* Attempted to make the MAC address detection working, but _SESSION
adds a Tab somewhere in the heading. Need to make it SQLLite DB at some
point.
* MAC address on-change handler established via jQuery on
document.reday().
* Added <input> placeholder fields.
* Removed default 00's MAC address.
* Replace timezone convert link to TimeAndDate.com
* Increased font size of <input>.