White cleanup

Hi,

I'm interested in using some of the Amazon portions of this project but noticed that a lot of the files had inconsistent indenting (sometimes spaces, some times tabs, sometimes spaces and tabs).  This pull request tries to standardize this by using tabs for indenting.

I also added a config file for http://editorconfig.org/, which is useful for getting different contributors' editors to use the same indenting format.

I'm also interested in helping clean up the Amazon code and possibly extending it a bit once I get more comfortable with the codebase.

Let me know if you have any questions, comments, or tips!

Thanks!
-Matt