Refine python source; minor edit to README.

Refactor python source for greater elegance and readability; as noted in
previous commit message, original code was incredibly crude due to
pressing time.

	* create single insertQuote() function, called by both the explicit
	"/submit" route and the submit field within "/index"

	* move block of code that formatted the posts list in home() to an
	independent function, formatPosts()

	* remove .cursor() calls from sqlite3 connections, which were
	unnecessary in calling .execute()

README edit:
	* remove code block