This commit allows debugging, hyperlinking, etc. towards sbt sources. Useful when working on the Sbt builder. * create a source bundle for the sbt library. I needed to inline the contents of sbt jars in order to get Eclipse to correctly associate sources with classfiles * created a new compiler.interface bundle, only for the compiler interface, together with the matching `compiler.interface.sources` bundle. Sbt requires this to be a separate jar and there was no way to build a single sbt bundle with only some of the dependencies inlined. A similar approach could be used for the Scala library/compiler bundles, but we should investigate the possibility of having the Scala team publish source bundles too (Re #1001889). (this was originally a commit from @dragos, which I have adapted based on the comments in #482) Fixes #1001888
This reverts commit d878a52.