Merge pull request #6 from amcgowanca/7.x-dev

Removed addthis extension component.
Clean up of legacy addthis references, removed reference to old tag field (should have been tags)
Merge pull request #7 from thomjjames/bugfix/field_tags_typo

Clean up of legacy addthis references, removed reference to old tag fiel...
Removed AddThis component references.