Add social-media icons; add py/ dir.

Add:
	templates/layout.html
		-add custom social-media icons for facebook, twitter, google+, and
		tumblr.

	static/dynamic.js
		-add appropriate functions for social-media sharing, and animate icons
		when hovered over.
		-change cursor when hovering over a button "link".

Mod:
	README.md
		-add information on dependencies/cloning and running the app.

Ref:
	py/
		-add directory for all Python modules, besides the Flask engine, app.py

	static/style.css
		-remove indents preceding most lines throughout the stylesheet, which
		were meant to group like selectors and imply hierarchy by identation,
		but may confuse others because the style isn't standardized or common.