using external libraries

If you are working on a library that is needed as part of this project, and in order to avoid having to upload that library to a remote server during the debugging phase ( which slows down development ) then you need to publish those libaries in the local Play repository that you are using. So before running the publish-local command for your library, run the following

$ cd Play20
$ export PLAY=`pwd`/Play20
$ export SBT_PROPS=-Dsbt.ivy.home=$PLAY/repository
$ ./sbt
> publish-local