Simplify UseProjectSettings
Simplifies AdditionalParametersWidget
Merge pull request #713 from huitseeker/issue/CustomCodeRemoval

Issue/custom code removal
Adds support for Scala 2.12
Adds 2.12 support in ScalaInstallationTests
Adds 2.12 support to ClasspathTests
Adds support for 2.12 in breakpoint tests
Bumps to master sbt version
THIS CHANGE NEED TO REVIEWED BEFORE PR

Remove the dependency to the bundled Scala 2.10
One more trace of 2.10
Removes bundled jar support for 2.10
Tweaks sbt-version for diff Scala version