Refactor document views specs

https://www.pivotaltracker.com/story/show/73291456
Summary of changes: https://docs.google.com/document/d/13TNmNkD6__d-7TbnvkNUV8yvCY8bc_SGa6ewxewrciE/edit?usp=sharing
`save_and_open_page` opens a blank page in the browser. I suspect this has something to do with this being a view spec. The `view_spec_page` solution is based on one Sam shared on StackOverflow: http://stackoverflow.com/q/13518855/2623544. I don't know enough about Linux to suggest an alternative, so I'll remove this as it's just a little helper method that may/may not be useful to anyone.