Cppjieba

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

+ Upgrade limonp to v0.5.6 to fix hidden trouble.

+ Upgrade limonp to v0.5.5 to solve macro name conficts in some special case.

+ 在 Trie 中去除之前糟糕的针对 uint16 优化的用数组代替 map 的设计，
该设计的主要问题是前提 unicode 每个字符必须是 uint16 ，则无法更全面得支持 unicode 多国字符。
+ Rune 类型从 16bit 更改为 32bit ，支持更多 Unicode 字符，包括一些罕见汉字。