Update api entries with 1.9 upgrade guide info

[dmethvin]

This could be broken into separate issues if that's more convenient.

• .toggle(function, function, ... ) removed
• jQuery.browser() removed
• .live() removed
• .die() removed
• jQuery.sub() removed
• .add()
• .addBack( selector ) replaces .andSelf()
• .after(), .before(), and .replaceWith() with disconnected nodes http://bugs.jquery.com/ticket/13338
• .appendTo, .insertBefore, .insertAfter, and .replaceAll
• AJAX events should be attached to document
• Checkbox/radio state in a .trigger()ed "click" event
• Order of triggered "focus" events
• jQuery(htmlString) versus jQuery(selectorString)
• Events not fired by the .data() method; names with periods
• Ordering of disconnected nodes within a jQuery set
• Loading and running scripts inside HTML content
• .attr() versus .prop()
• $("input").attr("type", newValue) in oldIE
• "hover" pseudo-event
• .selector property on jQuery objects
• jQuery.attr()
• jQuery.ajax returning a JSON result of an empty string
• jQuery.proxy() context
• .data("events")
• Removed properties of the Event object

[dmethvin]

We never documented .data()-fired events and I haven't seen any complaints so I'm not going to document they were removed.

[jzaefferer]

@dmethvin any chance you or someone else from the core team could finish this? "Ordering of disconnected nodes within a jQuery set" is interesting to me, since I recently hit a performance issue involving .add().