Some updates

[jeffw-wherethebitsroam]

Hi,

This is a collection of a few small updates for ruby_kml:

• include test kmls in the repository
• strip leading and trailing space from coordinates
• allow polygons to have multiple inner boundaries
• alias KMLFile.objects as features so it can be treated in the same way as containers
• specify dependency on builder in the gemfile

Hope they seem ok!

Jeff