Remove duplication in license/copyright.
Commented stuff carried over from old version.
Generic.settings: mappings for bin/, lib/, doc/ and man/

A Scala distribution is fully determined by the contents and dependencies of
the maven artifact "org.scala-lang" % "scala-dist" % version.value.

The contents of scala-dist itself is extracted to populate bin/, doc/ and man/.
The (transitive) dependencies populate the lib/ folder.

This configures sbt native packager's Universal config.

The next commit will take the jars under the javadoc classifier and extract/move
them to api/ to provide settings for the packager's UniversalDocs config.
Docs.settings: mappings for the api/ directory.

All dependencies of scala-dist under the javadoc classifier are included as
"api/jars/$artifactId-$version-javadoc.jar".

The core jars are also expanded under api/scala-{library|reflect|compiler}.

Also make constructing mappings reusable.

Needed to use updateClassifiers to get -javadoc artifacts,
don't seem to need to include the javadoc classifier in the scala-dist config.
Wix.settings: mappings for creating the MSI.

Takes the result of staging universal and universal-docs,
and creates a WIX xml description for `packageBin in Windows`
to be able to create an MSI.

We no longer distributing examples, and link to GitHub for sources.

As .bat files are published to maven using the windows line endings,
no need to convert.

PS: Would've called in Windows.settings, but that clashes with the
packager's Windows config object.