fix(common): give titles to sitemap groups @ footer
fix(common): fix links colors @ footer
fix(common): move footer inner styles to res-desktop
fix(common): move copyright inside main footer section
feat(*): expose social network links through a context processor
feat(common): add front-end assets for displaying SNS links
feat(common): insert main SNS links into the footer
Merge remote-tracking branch 'github/fix/footer-content'

Conflicts:
	brasilcomvc/settings/__init__.py