Use Scala 2.10 by default
Add "_2.10" suffix to <name>
Revert "Add "_2.10" suffix to <name>"

This reverts commit ee751b0cd2366a09aecb68d126e6f970a1d8da6e.
Switch from <classifier> setup to updating artifactId for setting Scala version
Explain how to build/release against specific Scala versions