Added Constant Methods for ASCII-to-Binary Operations

`+ (NSArray *)asciiGlyphs` returns an array of ASCII glyphs corresponding to `+ (NSArray *)asciiBinarySigned` and `+ (NSArray *)asciiBinaryUnsigned`.

`+ (NSArray *)asciiBinarySigned` returns an array of signed binary values corresponding to `+ (NSArray *)asciiGlyphs`.

`+ (NSArray *)asciiBinaryUnsigned` returns an array of unsigned binary values corresponding to `+ (NSArray *)asciiGlyphs`.