Simple displaying of QR codes.
See http://code.google.com/apis/chart/docs/gallery/qr_codes.html for more infos.

Tested with cakePHP 1.3.3

Includes functions to create QR codes for:
* free text
* contacts
* email sending
* calendar events
* Geolocations
* Android Market Searches
* MMS sending
* SMS sending
* Telephone calls
* URLs

Usage:
* Copy the "qrcode.php" to your "app/views/helpers" folder.
* In the Controller add 'Qrcode' to you helpers array.
* In the view for example do "<? echo $this->Qrcode->text('Hello World'); ?>"

Second parameter always is an optional option array. For explanation of these options and the required parameter for each function read the well documented Code. :)