Although embodiments of this invention have been fully described with reference to the accompanying drawings, it is to be noted that various changes and modifications will become apparent to those skilled in the art. Such changes and modifications are to be understood as being included within the scope of embodiments of this invention as defined by the appended claims. For example, specific examples are provided for shapes and materials; however, embodiments include those variations obvious to a person skilled in the art, such as changing a shape or combining materials together. Further, while some specific embodiments of the invention have been shown the invention is not to be limited to these embodiments. For example, several specific modules have been shown. Each module performs a few specific functions. However, all of these functions could be grouped into one module or even broken down further into scores of modules. Most functions performed by electronic hardware components may be duplicated by software emulation and vice versa. The invention is to be understood as not limited by the specific embodiments described herein, but only by scope of the appended claims.