Don't create errors at negative offsets.

Fixed #66
Reviewed name and description in feature projects

* Updated URL to documentation.
* Changed the feature name from ``Play 2`` to ``Play2``.
* Added notice in ``ScalaCompilerTemplate`` source.

Fix #60
Merge pull request #67 from dragos/issue/unclosed-comment-66

Don't create errors at negative offsets.
Merge pull request #68 from dragos/master

Only display problem annotations in the hover.
Fixed build script

For more information on why we default to use the ``eclipse-indigo`` and
``scala-ide-stable``, please read  the commit message in SHA:
87f4784c2eff856ee92f1450db656cf6419fda9f.
Merge pull request #70 from dotta/issue/reviewed-feature-projects-60

Reviewed name and description in feature projects
Merge pull request #71 from dotta/topic/fix-build-script

Fixed build script
Work with templates in any directory.

Now, with test!

Fixed #45.