Switching to using phpqrcode for QR code generation, as Google is due to shut down it's QR code generation API.

public/phpqrcode/qrconfig.php

@@ -0,0 +1,51 @@
+<?php
+    
+    /** \defgroup QR_DEFCONFIGS Global Config
+    Global config file (contains global configuration-releted constants).
+    Before version 2.0.0 only way to configure all calls. From version 2.0.0 values
+    used here are treated as __defaults__ but culd be overwriten by additional config. 
+    parrameters passed to functions.
+    * @{ 
+    */
+    
+    /** Mask cache switch. 
+    __Boolean__ Speciffies does mask ant template caching is enabled. 
+    - __true__ - disk cache is used, more disk reads are performed but less CPU power is required,
+    - __false__ - mask and format templates are calculated each time in memory */
+    define('QR_CACHEABLE', true);
+
+    /** Cache dir path.
+    __String__ Used when QR_CACHEABLE === true. Specifies absolute server path
+    for masks and format templates cache dir  */
+    define('QR_CACHE_DIR', dirname(__FILE__).DIRECTORY_SEPARATOR.'cache'.DIRECTORY_SEPARATOR);
+    
+    /** Default error logs dir.
+    __String__ Absolute server path for log directory. */
+    define('QR_LOG_DIR', dirname(__FILE__).DIRECTORY_SEPARATOR);
+    
+    /** If best mask is found.
+    __Boolean__ Speciffies mask searching strategy:
+    - __true__ - estimates best mask (as QR-Code spec recomends by default) but may be extremally slow
+    - __false__ - check only one mask (specified by __QR_DEFAULT_MASK__), gives significant performance boost but (propably) results in worst quality codes
+    */
+    define('QR_FIND_BEST_MASK', true);
+    
+    /** Configure random mask checking.
+    Specifies algorithm for mask selection when __QR_FIND_BEST_MASK__ is set to __true__.
+    - if Boolean __false__ - checks all masks available
+    - if Integer __1..7__ - value tells count of randomly selected masks need to be checked
+    */
+    define('QR_FIND_FROM_RANDOM', false);
+    
+    /** Default an only mask to apply.
+    __Integer__ Specifies mask no (1..8) to be aplied every time, used when __QR_FIND_BEST_MASK__ is set to __false__.
+    */
+    define('QR_DEFAULT_MASK', 2);
+    
+    /** Maximum allowed png image width (in pixels). 
+    __Integer__ Maximal width/height of generated raster image.
+    Tune to make sure GD and PHP can handle such big images.
+    */
+    define('QR_PNG_MAXIMUM_SIZE',  1024);                                                       
+
+    /** @}*/