[enh] valid json content type
[fix] unused var removed
[enh] about updates
[mod] wikipedia engine removed
[enh] engines.cfg gitignored
[enh] sample engine configuration file added
[doc] install notes
[enh] mediawiki engine added
[enh][mod] engines.cfg support
[enh] engine cfg compatibilty
[fix] character encoding fix
[fix] urljoin removed
[enh] bing engine added
[enh] bing section example
[enh] bing updates ++ language support
[fix] debug msg removed
[enh] url prettify
[fix] url encoding
[doc] flattr button added
[doc] flattr button link fix