Added compatibility with Rake 10.x.

Signed-off-by: James McCarthy <james@thisishatch.co.uk>
Updated README.md with authors.

Signed-off-by: James McCarthy <james@thisishatch.co.uk>
Bumped version to 0.3.0.pre2. Rake 10 compatibility

Signed-off-by: James McCarthy <james@thisishatch.co.uk>