Add Travis CI build test

Include 'rake' gem to run Travis build test
Include Travis yaml file configured for Ruby v2.1.1
Add namespaces and gems to gemfile

Organize gems into dev, test, and production namespaces
Add 'rake' gem to run Travis build test
Merge pull request #1 from nealfennimore/chore/model_validation

Chore/Add model and database validations
Merge pull request #2 from femmestem/chore/build_test

Chore/Add Travis CI build testing