Cppjieba-py

+ Make Compiler Happier.
+ Add PHP, DLang Links.

+ Notice(**api changed**) : Jieba class 3 arguments -> 5 arguments, and use KeywordExtractor in Jieba

+ add TextRankExtractor by [questionfish] in [pull request 65](https://github.com/yanyiwu/cppjieba/pull/65)
+ add Jieba::ResetSeparators api for some special situation, for example in [issue67](https://github.com/yanyiwu/cppjieba/issues/67)
+ fix [issue70](https://github.com/yanyiwu/cppjieba/issues/70)
+ support (word, freq, tag) format in user_dict, see details in [pr74](https://github.com/yanyiwu/cppjieba/pull/74)

+ rewrite QuerySegment, make `Jieba::CutForSearch` behaves the same as [jieba] `cut_for_search` api
+ remove Jieba::SetQuerySegmentThreshold

api changes:

+ override Cut functions, add location information into Word results;
+ remove LevelSegment;
+ remove Jieba::Locate;

upgrade:

+ Change Jieba::Locate(deprecated) to be static function.
+ Change the return value of KeywordExtractor::Extract from bool to void.
+ Add KeywordExtractor::Word and add more overrided KeywordExtractor::Extract