Remove external JSON functions
As of PHP 5.2.0, the JSON extension is bundled and compiled into PHP by default. Since the minimum required PHP for SwissCenter is 5.2.6 then there is no need to keep the external JSON functions, and so should be removed.
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(In revision:1604) Removed the external JSON functions, and all references to it. All calls to json_decode will use the JSON extension compiled in PHP.
Closed #265
Closed #265