Adding play 3.0 support. Fixes #564

[tardigradeus]

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Fixes

Fixes #564

Purpose

This PR adds support for Play 3.0.

What does this PR do?

Background Context

Why did you take this approach?

The only files referencing akka was MongoController, so it was modified per version. The build.sbt was edited to pull the correct dependencies, inspired by the way it was done in reactivemongo-play-json build.sbt.

References

#564

[tardigradeus]

Hi @cchantep, do you have any updates on this? Should I close the requested change once I believe it's completed and there are no further additions?

[cchantep]

For now there is issue with Sonatype support of snapshot publication with variant (not fully respecting semver)