change mysql for mysqli
Added MySQL enum data type
Merge pull request #72 from filer/master

MySQL enum type
Escape enum values
Merge pull request #71 from tonkonogov/master

Outdated adapter for mysql
Merge pull request #73 from filer/master

Escape MySQL enum values
Merge remote-tracking branch 'upstream/master'

* upstream/master:
  Escape enum values
  Added MySQL enum data type
  change mysql for mysqli