48371089 add exponential backoff for cheetah

Squashed commit of the following:

commit 1da8aad9fcd5dce516f894b57c1561307cd3ec1b
Author: Brad Reid <bradreid20@gmail.com>
Date:   Thu Apr 18 16:51:13 2013 -0700

    bump version

commit 493dc6d679daed02279b5e7890314f93fa9e6142
Author: Brad Reid <bradreid20@gmail.com>
Date:   Thu Apr 18 16:50:38 2013 -0700

    add exponential backoff