Merge pull request #1 from dalizard/master

Require YAML from std library
Promote ActiveResource as gem dependency
Add AppConfig.active? methods
Loader has grown and is time to move its own file
Initialize the example project
Bump year
Add Railtie
Very basic example
Quiet assets and Thin server in example app
Use Dotenv in example
This example is so simple we don't need any javascript
Remove unneeded Rails files for the example
Update README
Rename example controller
Add explanations for the example
Raise error if enviroment is missing from settings
Add spec for the example
Improve style of the example
Fix a typo
Add CHANGELOG