feature: new aws instance types

This pulls in PR #335

https://github.com/infochimps-labs/ironfan/pull/335/commits

It adds new instance types to Ironfan.

Squashed commit of the following:

commit 5032b30ebf9ef804ba392f9cea4dc90c8e6218e6
Author: Josh Bronson <josh.bronson@gmail.com>
Date:   Fri Feb 14 15:25:54 2014 -0600

    regenerating gemspec

commit 840073b1c3d2a3098105d3ea6a7a667ec51b84ef
Author: Josh Bronson <josh.bronson@gmail.com>
Date:   Fri Feb 14 15:25:27 2014 -0600

    Version bump to 5.0.9

commit 64170af9a394e6bc1825ecdf798b65287c1d212a
Author: Michael Mittelstadt <meek@getsatisfaction.com>
Date:   Tue Jan 21 14:51:57 2014 -0500

    Added new M3 types, added new M3 isntance disks, corrected m2.xlarge price

commit ff4abe63c48f73f538c5d11c00675bfdb9bc75e8
Author: Michael Mittelstadt <meek@getsatisfaction.com>
Date:   Thu Nov 21 15:18:39 2013 -0500

    [aws] Add I2, C3, G2, CR1 instance types, change M3 prices

    Also removes non-existent instance type cc1.8xlarge, and adjusts the
    number of vCPUs for cc2.8xlarge.

Change-Id: I68d14ba6b6eed8c9b218a1d031bec0afcde8d92e