support cos similarity match & bug fix #26
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支持余弦相似度匹配，test 对比多种 cos 算法，譬如 tf-idf + cos、忽略权重 cos、计数权重 cos、、simhash、minhash 等，对比后效果最好的是 忽略权重 cos，第一个和第二个相似度差距明显。速度上和 chunk 差不多，一会快一点，一会慢一点，批量回放30+条记录 cos 快2-3s。准确性以发单接口为例，101个下流调用，忽略权重 cos 和 chunk 算法的结果一致，其他算法有个位数匹配失败。
readable 切分 fix bug
outboundBypassPorts 支持多个端口
evgarg 统一日志相关初始化到 initLog 函数中
原来 chunk 算法保持不变