Adds spec environment and tests

# What
This PR adds an RSpec testing environment to start spec coverage for the gem. Specifically, this tests proper URL copying to the Clipboard and proper output message to the terminal. 

This initial PR is meant to generate discussion about how the functionality can be modified and modularized in order to develop proper test coverage. 

# Testing
Clone into your terminal, `cd` into directory, run `bundle` and then run `rake spec`