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