Added controller spec continuous_and_instantaneous_push_view_controller_spec.rb

-This is a multi controller spec file that unit tests the
ContinuousPushViewController and InstantaneousPushViewController.
Most of the tests are common to both VCs and those that are not are
handled conditionally in the ‘each’ iteration of the two classes.

- Two attr_accessors, distance and angle, were added to assist the
testing of these vars before and after a view tap operation.

- Accessibility labels were added to the class views to assist with the
testing of view existence as well as tap operations.

- The redundant continuous_push_view_controller_spec.rb file was
deleted.
Merge pull request #18 from dennismajor1/spec_tests

Added controller spec continuous_and_instantaneous_push_view_controller_...