Issue #371: Added 'Cancel' link to Taxonomy Term forms.
Issue #368: Added 'Cancel' link to User forms.
Issue #371: Added path to vocabulary.
Issue #368: Added access check for 'admin/people' path & 'frontpage' fallback.
Merge pull request #501 from BWPanda/368/cancel_link_for_user_forms

Issue #368: Added 'Cancel' link to User forms.
Issue #369: Added 'Cancel' link to Block forms.
Merge pull request #500 from BWPanda/371/cancel_link_for_taxonomy_forms

Issue #371: Added 'Cancel' link to Taxonomy Term forms.
Merge pull request #504 from BWPanda/369/cancel_link_for_block_forms

Issue #369: Added 'Cancel' link to Block forms.