Add :slug test and clean up test names.
Add fixture helper that reads fixture file.
Add feed xml fixture.
Add passing view tests to make sure views contain important data.
Add tests for invalid /:slug and /page/:number routes
Update /page/:number route to use regex to make sure param is numeric only.

As an added precaution use to_i instead of Integer() since param will
always be a string and if the string isn’t convertible to a number then
0 is returned.