Make Pinny data-attribute initialization more robust
Throw common error if no effect is declared
Move shade call after Pinny effect call.
Make header/footer subheader to structur
Merge branch '1.0-alpha' of github.com:mobify/pinny into a11y

Conflicts:
	dist/pinny.js
	dist/pinny.min.js
	src/js/pinny.js