Simplify style additions

This uses ```const_defined?``` and ```const_get``` to see if a style name with the view's class exists.  That is, ```UILabel``` checks for the constant ```UILabelStyler```, and calls its ```new``` method.  This allows adding new styles for objects RMQ may not yet have to be as simple as defining the appropriate class in the correct namespace.  It also makes it easier to add new styles without having to remember to update a ```case``` block.