Added emitting of open/close events to modal_id

Simply added namespaced open and close events via jQuery trigger method. Nothing more, nothing less.
Added e.preventDefault() to closeButton click event

This keeps the close button link from executing and putting nasty little hashes on the end of the URL for the current page. Nothing more, nothing less.
Spacing and quote style and valid HTML tag quoting

I took the liberty to reformat the spacing and indentation, as well as make the use of single and double quotes consistent and where single quotes were used in HTML tags, double quotes replaced them. Nothing more, nothing less.
Added how to, including events

Added the "how to" from the website to the README, along with the new event features, change log and authors info.
renamed README to display markdown in github
added Github Flavored Markdown fenced code blocks
fixed some formatting and added some Github Flavored Markdown specific syntax
added LICENSE file containing MIT and GPL licenses
bug fix to prevent multiple overlays from being created
fixed spacing from github
made compatiable with jQuery 1.8+
added preventDefault to overlay click