Release candidate with sphinx 0.9.8 support

New version of cppsphinxclient library, that supports protocol version 0x113 (since sphinx 0.9.8). Still, older versions of sphinx communication protocol are supported. Newly, multi-queries are supported and also support for attribute live update has been added (missing in previous versions). Commands "excerpt" and "keywords" aren't supported and nobody knows, if they ever will be :-) (we didn't need these features yet).