Rake enhancements

* Added pry gem on development env
* Added 'rake console' command to play around with the app environment
* Fixed a bug that was incorrectly loading test env everytime
Merge branch 'master' into rake-tasks-enhancements
Merge pull request #2 from AxionTecnologia/rake-tasks-enhancements

Rake enhancements
Added new Hashie::Mash#pick method
Simplified employees#put API call
Merge branch 'master' into code-refactor