Merge branch 'hotfix/2.1.7' into develop
Merge branch 'hotfix/2.1.8' into develop
Merge branch 'hotfix/2.1.9' into develop
Merge branch 'hotfix/2.1.10' into develop
Initial update for oauth2-php 2.2.0.
Update docs with latest changes.
Merge branch 'release/2.2.0'