compatible with windows file path, regression filepath.Join

  support allow-collates checks

  go test ./... -update

  ref: https://github.com/XiaoMi/soar/pull/147

  Thanks @xiyangxixian

  COL.015 text/blob default value only tobe `NULL`;
  COL.012 text/blob `NOT NULL` CONSTRAINT may be danagerous;

  insert values count large than -max-value-count will give ARG.012

  When set log to console, if fmt.Print larger than 1K
  the output buffer will be truncate. This problem will be
  trigger when set log to stdout, beego and soar both print their
  output into stdout, and this may come into confusing status in
  mac os.

  For fixing this problem, we only allow set log to file not.
  SOAR never write SQL suggest into log. Only developer should be
  concern about log, common user have no need of looking up log.

  remove bom before auditing

  chardet will detect input sql charset

  -check-config will check
  * YAML format
  * OnlineDSN connection
  * TestDSN connection

  add doc for blacklist config

  1. etc/soar.blacklist add `use ?`
  2. blacklist use os.Getwd prefix
  3. update doc

  1. fix -config arg parse bug
  2. code & comment lint

  #47 pretty print function `format` endless loop
  #37 -report-type not in (markdown, html) will not print score

  #5
    Go version large than 1.8 has default GOPATH.
    use `go env GOPATH` get GOPATH envirment variable.

  daily build update
    update vitess vendor package
    update document about installation and configration