Remove/deprecate/document sneak-dependency methods

[dmethvin]

Some methods are ambiguous, creating "sneak" dependencies that are going to confuse Closure Compiler and also thwart manual attempts to reduce size.

• jQuery.fn.load() - Either needs event.js or ajax.js; only the arguments tell for sure. Can we deprecate/remove one or both to make it unambiguous? At minimum need to document effect of its use.

• jQuery.fn.show(), jQuery.fn.hide() - Needs effects.js only if a speed is provided. Can we deprecate the animation-related ones? Again, we at least need to document it.

As a starting point I suggest we deprecate the event behavior of .load() and the animate behavior of .show()/.hide(), removing them in 2.0. Perhaps we could put in a jQuery.error() if .load() detects it's being called all event-like.

Are there other examples?