Added scala, scalatest, and junit to the project.

Added scala objects to parse Import-Package headers
into a list of PackageImport objects and added unit
tests to verify this functionality. This is not yet
incorporated into the parser.
Merge pull request #1 from maier49/import-package-parser

Added scala, scalatest, and junit to the project.
Use new Scala Import-Package parser.

Incorporated new "org.neo4j.osgi.parser" scala package
to parse the "Import-Package" statements.
Also introduced two new interfaces "DirectoryImporter"
and "FileImporter" for cleaner separation.

This now reads actual package imports correctly!
There are a few NPE's coming out of the scala parser.