Added an #arc_length function to the Circle class.

The arc_length functin will take an angle in degrees and return the size of the
length of the arc on the circle it was called from.

In order to better facilitate this the Numeric class was opened and a degrees and
radians function was added.

These are still very young and will likely need to be adjusted as other scenarios present
themselves
Removed rotation.

Looking for another means to implement rotation.
Chagned the PolyPoint class to a Module.

The PolyPoint class is now a PolyPoint module.

The module will turn the class it is included in into an Enumerable object.

Polypoint confers a series of polypoint related methods.
Added a perimeter function to the Rectangle class.

Updated the README.md
Added the Triangle class.

The basic implementation for this class has been step. It extends from TwoDimensional
and includes the PolyPoint module. It defines an each method that will yield successivley
to the first, second, and third point.