Travis: add prebuilt cmake 3.1

I got on a Travis VM and built a binary package for the latest version of cmake. Now we can use all the nice functionality. 

* update the commented out code that was only for 2.8.7
it is where we host all the other files. Accepting suggestions


Mauricio Carneiro, Ph.D.
http://www.broadinstitute.org/~carneiro/

On Tue, Nov 4, 2014 at 10:23 AM, droazen <notifications@github.com> wrote:

> In .travis_scripts/cmake.sh:
>
> > @@ -0,0 +1,5 @@
> > +#!/bin/bash
> > +
> > +wget http://www.broadinstitute.org/~carneiro/travis/cmake_3.1.0-rc1-1_amd64.deb
>
> Is this really the best place to host this?
>
> —
> Reply to this email directly or view it on GitHub
> <https://github.com/broadinstitute/gamgee/pull/353/files#r19809071>.
>