Removed files that should be ignored

As we discussed, these files should be ignored, but were added before the `.gitignore` file was put in place. This means that git needs a specific command in order to have them removed. (For the record all subsequent files like this that are created would be ignored, these just "got in" before the rule).

This isn't a common occurrence, but to fix this, I ran the following commands:

    git rm --cached .DS_Store
    git rm --cached js/.DS_Store

For more information on this: http://stackoverflow.com/questions/7527982/applying-gitignore-to-committed-files