QR Code encoder

The QR Code encoder, based on Lior Shapira's work

This is the next incarnation of Lior Shapira's QR encoder, based on ZXing library.

It supports error correction levels, character sets other than ISO-8859-1 and the parameters are passed on more readable manner.
NB: using character set other than ISO-8859-1 will probably make QR code unreadable by any QR decoder, except ZXing's.
UTF-8 is set the default encoding!

The QR decoder is the same as Lior Shapira's, http://www.mathworks.com/matlabcentral/fileexchange/29239-qr-code-encode-and-decode