ScalikeJDBC 1.7.3
version 0.9.21

 - scalatra-sbt 0.3.2 -> 0.3.3
 - json4s 3.2.5 -> 3.2.6, ScalikeJDBC 1.7.1 -> 1.7.3, Thymeleaf 2.1.1 -> 2.1.2
 - Fixed a bug that AssetsController doesn't set valid Content-Type
 - Changed SkinnyResource update response to redirection
 - Fixed #46 Too slow test execution (just reduced pain)
 - #20 Accepting snaked_case'd parameter names
 - Added UsageSpec for skinny-validator
 - Removed assets example files from skinny-blank-app
 - Fixed build settings by @gakuzzzz
 - Refactored skinny.Params by @gakuzzzz