Update package names to the new package structure.

Fixup for scala-ide/scala-ide#636
Adds back dependency to sdt.core.test
Merge pull request #86 from skyluc/new-package-structure

Update package names to the new package structure.
Updates to next development version
Merge pull request #89 from skyluc/issue/next-dev-version

Updates to next development version
DO NOT MERGE use plugin-profiles snapshot