Do not mess with the $LOAD_PATH

RubyGems should handle all necessary $LOAD_PATH manipulation.

Use the -I argument to ruby when testing outside of rubygems:

    ruby -Ilib .bin/qtrix

See http://guides.rubygems.org/patterns/#loading_code
Remove references to `bundle exec`

Bundler is just one possible way of managing dependencies and is not a requirement of qtrix.
Merge pull request #5 from PeopleAdmin/code_loading

Reduce code loading bias