Deleted unneeded package export from MANIFEST in compiler.interface bundle
No need to declare the Manifest version because version 2 is the default
No reason for putting the manifest in the ${basedir}
No need to put the sbt version number in the bundle name
Adding organisation information in the POM to reduce duplication
Added source bundle for Sbt compiler interface
Deleted unneeded import-package clauses in toolchain MANIFESTs

The maven build does no longer spits out warnings for unused package imports in MANIFESTs.