jQuery Nearest Element plugin

Full documentation is at http://gilmoreorless.github.com/jquery-nearest/

Method signatures:

• $.nearest({x, y}, selector) - find $(selector) closest to x/y point on screen
• $(elem).nearest(selector) - find $(selector) closest to elem
• $(elemSet).nearest({x, y}) - filter $(elemSet) and return closest to x/y point on screen

Reverse logic:

• $.furthest()
• $(elem).furthest()

Intersecting/touching:

• $.touching()
• $(elem).touching()