Added Client Class

Initial set up of Faraday and initialization are working for a hardcoded
example.
Items

Users can now search items by ID
Added Coveralls and Travis CI
Updated readme for coveralls
removed travis yml from gitignore
Actually adding travils.yml this time
Removed bundler version for travis
Added rake task for rspec
Removing email notifications
Merge pull request #1 from allcentury/client

Client