Adding tootip functionality

Added the [tooltip] shortcode which allows a user to easily add tooltips to their content.

Usage:
[tooltip title="this is in the tooltip"]...[tooltip]

Additional paraemters:
placement
	description: the placement of the tooltip
	values: top|bottom|left|right
	default: top
animation
	decripion: apply a css fade to the tooltip on show/hide
	values: true|false
	default: true
html
	description: allow use of html in the tooltip
	values: true|false
	default: false