The description provided above is illustrative of the present invention, and should not be construed as a limitation thereon. While certain demonstrative embodiments of the present invention have been described above, those of ordinary skill in the art will easily understand that many modifications may be made to a demonstrative embodiment without departing from the novel teaching or an advantage of the present invention. Therefore, all such modifications are intended to fall within the scope of the present invention as defined by the claims. It should be understood that the description given above is illustrative of the present invention, and the present invention should not be deemed to be limited by specific disclosed embodiments; in addition, modifications made to the disclosed embodiments and other embodiments are intended to fall within the scope defined by the attached claims. The present invention is defined by the claims and equivalents thereof.