Expose Railtie configuration to apps. Closes #3
Merge pull request #16 from seuros/master

Let the application configure the default Global ID app name and its signed message verifier.
URL-safe Base64 for use in routes and params
Merge pull request #11 from bencrouse/master

URL-safe Base64 for use in routes and params
Explain padding gymnastics
Bump version for the latest fixes and improvements
Test the padding parsing (there is a failure right now!)
Fix padding bug
Bump for the parse fix