Constructor takes CSS class selector and can call several functions on DOM ready.
Utility features testing module added.
``getClasses`` utility method added.
``getClasses`` tested with classes-free elements.
Dollar sign tests moved to utility.js
Instance testing module added.
Instance's ``classes`` method gets classes on no arguments.
Setting CSS classes using ``classes`` method.
Tests for command processing was added.
Commands' syntax control added.
Commands to classes code was added.
``setClasses`` utility function was added.