Update Gemfile to use bundler

Goal was to make it easier to build and declare all dependencies.
Will circle back and fix actual running tests later

- updated to use mini-test
Merge pull request #2 from kbrock/gemspec

Update Gemfile to use bundler
Update Gemfile to use bundler

Goal was to make it easier to build and declare all dependencies.
Will circle back and fix actual running tests later

- updated to use mini-test