Setting status code correctly

Proper clean-up of error data

Unit and mock tests for clicks

Unit and mock tests for expand

Strict encoding for expand and click

Add canned error support

Add localized text for rate limited

Improve returned error information

Strict encoding of long url

Enable gcov code coverage generation

Less intense

Ignore OCMock

Basic unit and mock testing of the shorten method

Refactor to support unit and mock testing

Added method for getting number of clicks on a shortened link