Added optional domain config + support for auth0-php 1.0.2

1.2.2

Merge branch 'master' of github.com:auth0/jwt-auth-bundle

SDK Client headers spec compliant

Merge pull request #7 from auth0/1.x.x-dev

SDK Client headers spec compliant #6

Api v2 + SDK 1.0 support

Use auth0-php instead of custom implementation no Auth0Service #4
Auth0 settings should be optional #3 (domain is optional)
Remove auth0 dependency from the project #2 (domain is optional and secrets can be non base64encoded, auth0-php is used to decode tokens and is not needed for anything else)