Resolve issue #5.  Add addProtocol support to Config.
Add tests for #5.  Update syntax.  Add IntelliJ files to .gitignore.

Syntax now is:
protocols attribute: 'href', value: 'http'
protocols attribute: 'href', value: [ 'http', 'https' ]
Add more tests for #5
Merge pull request #6 from ishults/master

Resolve issue #5.  Add addProtocol support to Config.

Includes tests.