install sbt 0.11.2 if you do not have it already. You can get it from here: https://github.com/harrah/xsbt/wiki/Getting-Started-Setup
execute 'sbt' and then help play for play specific commands
execute sbt and then compile to build the project
execute sbt and then 'run' to run the built-in development server
onece the development server is running, documentation is available at http://localhost:9000/@documentation