Employee Resource Groups Page

I had to fork because I don't have write access.

This page is getting added to create visibility for some of the employee resource groups we have.
There's currently no direct link to it from anywhere else on the website. I think I'll need design help for how
to get a link to this from the jobs page (@jonsaq). I'm looking on feedback on the implementation and then the go ahead
to merge this into the development environment. Copy and images will get updated before adding a link to this
page from elsewhere on the site.

`grunt test` failed on `filling out the create account form` but I think it's a local configuration thing since the error is 
```
filling out the create account form : shows the logged in utility nav ...
phantom stdout: TypeError: 'undefined' is not an object (evaluating 'w.Munchkin.munchkinFunction')

  http://0.0.0.0:9000/dist/assets/js/bundle.js:9111
  http://0.0.0.0:9000/dist/assets/js/bundle.js:9731

phantom stdout:   http://0.0.0.0:9000/dist/assets/js/libraries/jquery-modernizr.min.js:9
  http://0.0.0.0:9000/dist/assets/js/bundle.js:8962

Failed.
```
I didn't run `grunt build` since the quick start guide says not to.

@dtothefp @kylerush For your review

CC: @mi-wood @chestone(does this work...?)