Created the BoundingBox model

This model is used to wrap around an object and identify the area that
the object occupies. Using the static function isIntersecting(), one
could tell if two boxes are occupying the same space.
Implemented collision detector algorithm

Exponential time algorithm to check if each body is colliding with
another.
Implemented Body Model

Added constructors, updatePosition(), added members
gravityInfluenceRangeOffset and radius.
Fixed detection bug

Fixed bug where detection where the other space components where not
considered in the intersection.