Squashed commit of the following:

commit 4ede04717b8dbe05abba525a8c5f24eed4b3aaef
Author: Etienne Cimon <etcimon@gmail.com>
Date:   Tue May 27 13:39:52 2014 -0400

    Added documentation and GCStats version

commit c24a060a3044a892381051dfd37dc302ddb30e9d
Author: Etienne Cimon <etcimon@gmail.com>
Date:   Tue May 27 13:33:45 2014 -0400

    Calculate freed size of big allocations

commit af31878ba2282fc123b526ab088fb82f153930c9
Author: Etienne Cimon <etcimon@gmail.com>
Date:   Tue May 27 13:23:46 2014 -0400

    Wasn't returning the proper used size