text: Title: Documentation issue for pn.pane.Image and others
  Body: I noticed that the reference for pn.pane.Image, pn.pane.PNG, and pn.pane.JPG (and I suspect some of the other image related panes) says to use `style` to denote CSS style, when it's `styles` as the actual parameter keyword that should be used.
  
  Sorry if this is not the best place to put this! I'm never sure where documentation errors should be left.