Delete db requirements from dummy application

* Reduce noise and simplify dummy application
* Followed instructions from
http://stackoverflow.com/questions/3954307/rails-3-how-do-i-avoid-databa
se-altogether
Import dummy rake tasks

* Running bundle from within a rake task caused the jasmine:ci task to
fail unexpectedly
* Loading the dummy_app tasks within a namespace and calling the
jasmine tests through that works as expected
Add RSpec spec task