Revert "Move to Scala OSGi bundles."

Partial revert, kept the Java 1.6 dependency definition.

This reverts commit e6f68f08fa79c00ab019ea0523eca667d14f3b0d.
Revert "Bumped to the most recent release of plugin-profiles"

This reverts commit d8ddbbe79ee416ac40944eb87e4335d66078c8d3.
Revert "Fixed source compatibility with latest Scala IDE master"

This reverts commit 9e83a5f42b12315ef96871d5d04624560030b799.
Adds a local impletation of the version checker

It is not available in the test tools from Scala IDE 3.0.x.
Merge pull request #88 from skyluc/pre-tag/0.2.2-3.0.x

Prepare 0.2.2 release on Scala IDE 3.0.3