Refactor multi-route specs

This makes the relationship between the setup and the spec explicit,
clarifying which bit of setup is actually being tested.
Merge pull request #80 from kytrinyx/refactor-multi-route-specs

Refactor multi-route specs
Merge branch 'polish-namespace-specs' of github.com:kytrinyx/sinatra-contrib

Conflicts:
	spec/namespace_spec.rb
Merge branch 'master' of github.com:TrevorBramble/sinatra-contrib