Merge pull request #11 from wwojcik/feature/user_model

configuration for postgresql adapter
Merge pull request #12 from wwojcik/feature/user_model

fix README format
Merge pull request #13 from wwojcik/feature/user_model

fix travis
Merge pull request #14 from wwojcik/feature/user_model

fix travis postgresql
Merge pull request #15 from wwojcik/feature/user_model

fix travis env
Merge pull request #16 from wwojcik/feature/user_model

fix travis create db
Merge pull request #17 from wwojcik/feature/user_model

fix travis create user database
Merge pull request #18 from wwojcik/feature/user_model

fix travis create user database
more changes