Use plugin-profiles parent pom.

Also added an Import-Package clause to hack around the [P2 bug](https://bugs.eclipse.org/bugs/show_bug.cgi?id=352560) that selects
sdt.core `2.0.2` from the stable update site.
Merge pull request #123 from dragos/refactor-poms

Use plugin-profiles parent pom.
Merge remote-tracking branch 'upstream/master'
add test for unicode characters