* configured spring repo in the 'parent-kotlin' model
to allow using spring's milestone artifacts
* configured jackson kotlin module in the 'parent-kotlin'
to allow easy use of kotlin data classes with jackson
* switched spring-mvc-kotlin from explicit spring
dependencies to spring-boot
* mockmvc dsl article's source and tests
* Upgraded dependencies
* Fixed test in Linux Environment
* Added I/O samples
* FIX End of line reference, previous version was OS dependent
* CHORE Added junit5 dependency
* UPGRADE gradle version, UPDATE versions
* Deleted emtpy lines