joe/wukongd: wukongd is a search engine working as a standalone service, based on wukong @ 5b2043df2d5394ed7223c72645e7b4e48c64831e

yll 00b3fdde16 update: 存储引擎支持配置文件		4 éve
..
counters.go	6841ff5b85 实现了对索引的批量加入和删除操作，并添加单测	10 éve
engine.go	00b3fdde16 update: 存储引擎支持配置文件	4 éve
engine_test.go	3d75a88c8c change docId to string type	4 éve
indexer_worker.go	3d75a88c8c change docId to string type	4 éve
persistent_storage_worker.go	3d75a88c8c change docId to string type	4 éve
ranker_worker.go	3d75a88c8c change docId to string type	4 éve
segmenter_worker.go	3d75a88c8c change docId to string type	4 éve
stop_tokens.go	77121830e9 第一发	12 éve