@WIP Adding resource for message rendering

The views do not work but the routes and index action appears to work.
Updating how contexts are set

I would like to always work with Arrays.
Adding view tests for show page
Switching Harbinger database to real DB channel
Ensuring the engine loads appropriate deps

By putting this in the to_prepare, all of the gems are loaded and
required.

This may create issues with implementation. So be wary!
Adding end to end exception handling message

This is not yet complete but calls attention to what I was hoping to
have.
Ensuring that Exceptions are reported properly
Adding spec test for index page
Adding Capybara

I'm expanding the rspec/rails require to do everything except
Capybara. There is no reason to load capybara for base view tests.
Adding spec for channel message
Working on feature for exception rendering
Finalizing end to end exception handling feature
Merge pull request #1 from jeremyf/dltp-123-exception-handling

Adding end to end exception handling