Feature/total pages

[howmuchcomputer]

• Fix spec_helper mongoid database configuration
• Create mongoid.yml
• Add total_pages method
• Fix failing test suite
• Formalize default page limit as constant
• Add pry to aid with debugging

[ajsharp]

This is great, thanks for this.

[howmuchcomputer]

Do you understand the error that occurred? Is it something I can fix?

[ajsharp]

I haven't updated or maintained this repo in a long time. I've updated the list of ruby versions travis looks for, but there are also problems with spec_helper.rb because it's using a very old version of mongoid configuration there. I'd welcome a fix for that in this PR if you want to do it.

[howmuchcomputer]

I updated the mongoid config in the original PR. Are you sure it is the mongoid config that is causing the issue? You might have to add a sleep before_script as mentioned here: https://docs.travis-ci.com/user/database-setup/ if it is failing to connect.

Might also be failing from the rspec warnings generated from the use of 'should' matchers. Thoughts? I can update those to 'expect' if necessary.