XINS 3.1

What's new:

• Added support for caching of the result.
• Added possibility to return not modified with no data.
• Improved performance.
• Added JSON-RPC 2.0 calling convention.
• Added the result codes: _FunctionNotSpecified, _FunctionNotFound, _InvalidRequestFormat, _NotAllowed, _DisabledAPI
• Added possibility to handle compressed (gzip) result data.
• Added example with jQuery.
• Various bug fixes