Update PHPDoc typo.
Setup initial locations class properties and magic setters/getters.
New SLPlus class, on which all other things will hang.

Extends WPCSL (though this may be flipped later).
New SLPlus class, on which all other things will hang.

Extends WPCSL (though this may be flipped later).
Invoke the new SLPlus class.

Isse #62
Location class tweaks, add set_PropertiesViaArray method.

Issue #61