This library implements rendering of pop-up box with "Clippy, the
paper clip".  You can make him say various things by calling
`clippy-say' function.  To hide the pop-up, simply invoke any
command (move forward/backward, type, `C-g` etc., any event is
recognized).

As inspiration, two functions are provided:
`clippy-describe-function' and `clippy-describe-variable'.  Bind
any of these functions to a key, then while point is over a
function/variable, call it.  A popup with helpfull clippy will
appear, telling you about the function/variable (using
`describe-function' and `describe-variable' respectively).