Removed the .classpath file from being tracked.

Hopefully this will allow us to stop having to update our .classpath file. I also added ".classpath" the ignore list, which should make our Git's stop trying to update the file or download updates of it.
Lastly, I added the ".DS_Store" filetype to the ignore list, to try and keep it from being added/updated to your guys file as well. Description of what the ".DS_Store" file type is can be found here: http://en.wikipedia.org/wiki/.DS_Store