new features and performance improve

• new: support operator gt/lt/between
• new: repeat one field multi times in one conjunction
• new: geohash support by default
• improve: scanner performance improve by https://en.m.wikipedia.org/wiki/Exponential_search
• improve: support negative doc id

feat: add LICENSE FILE

• add license file under MIT

stable branch version for online production

stable version for production usage

修复因错误共享一个map而导致的并发访问错误

修复: 默认的Parser错误的共享了一个map导致并发读写错误

new roaring-bitmap based indexer and memory effective results collector for be-indexer

1. 基于Bitmap的布尔索引实现,利用roaring bitmap,可实现高效的内存使用场景.
2. BEIndexer 添加了Collector相关API,可以有效避免查询时的内存分配.

fix negative conjunction retrieve bug

1. fix: some cases be skipped for the negative conjunction case
2. refactor: rename struct name use in retrieve process

compacted entries support for effective memory use

1. fix log error
2. add a new compacted entries posting list for memory save purpose
3. extract interface for client(users)

fix skip error when exclude field

v0.0.2

fix skip error

tag for first init release

tag for first init release