Github user shimamoto commented on the issue:
https://github.com/apache/incubator-predictionio/pull/345
Just for your information.
I tried my hand at removing unnecessary dependences and setting the
`crossScalaVersions` as well.
https://github.com/shimamoto/incubator-predictionio/commit/ad0cace0507a951a160e29b3e1e7d9deb58aba22
At the tools project, type `+assembly`. Then, create all versions jars.
This is just temporary. I still have things to do. Sooner or later, I will
open a PR.
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