Added documentation for the panel wrapper module

Doc/lib/libcursespanel.tex

+\section{\module{curses.panel} ---
+         A panel stack extension for curses.}
+
+\declaremodule{standard}{curses.panel}
+\sectionauthor{A.M. Kuchling}{amk1@bigfoot.com}
+\modulesynopsis{A panel stack extension that adds depth to 
+                curses windows.}
+
+Panels are windows with the added feature of depth, so they can be
+stacked on top of each other, and only the visible portions of
+each window will be displayed.  Panels can be added, moved up
+or down in the stack, and removed. 
+
+\subsection{Functions \label{cursespanel-functions}}
+
+The module \module{curses.panel} defines the following functions:
+
+
+\begin{funcdesc}{bottom_panel}{}
+Returns the bottom panel in the panel stack.
+\end{funcdesc}
+
+\begin{methoddesc}{new_panel}{win}
+Returns a panel object, associating it with the given window \var{win}.
+\end{methoddesc}
+
+\begin{funcdesc}{top_panel}{}
+Returns the top panel in the panel stack.
+\end{funcdesc}
+
+\begin{funcdesc}{update_panels}{}
+Updates the virtual screen after changes in the panel stack. This does
+not call \function{curses.doupdate()}, so you'll have to do this yourself.
+\end{funcdesc}
+
+\subsection{Panel Objects \label{curses-panel-objects}}
+
+Panel objects, as returned by \function{new_panel()} above, are windows
+with a stacking order. There's always a window associated with a
+panel which determines the content, while the panel methods are
+responsible for the window's depth in the panel stack.
+
+Panel objects have the following methods:
+
+\begin{methoddesc}{above}
+Returns the panel above the current panel.
+\end{methoddesc}
+
+\begin{methoddesc}{below}
+Returns the panel below the current panel.
+\end{methoddesc}
+
+\begin{methoddesc}{bottom}
+Push the panel to the bottom of the stack.
+\end{methoddesc}
+
+\begin{methoddesc}{hidden}
+Returns true if the panel is hidden (not visible), false otherwise.
+\end{methoddesc}
+
+\begin{methoddesc}{hide}
+Hide the panel. This does not delete the object, it just makes the
+window on screen invisible.
+\end{methoddesc}
+
+\begin{methoddesc}{move}{y, x}
+Move the panel to the screen coordinates \code{(\var{y}, \var{x})}.
+\end{methoddesc}
+
+\begin{methoddesc}{replace}{win}
+Change the window associated with the panel to the window \var{win}.
+\end{methoddesc}
+
+\begin{methoddesc}{set_userptr}{obj}
+Set the panel's user pointer to \var{obj}. This is used to associate an
+arbitrary piece of data with the panel, and can be any Python object.
+\end{methoddesc}
+
+\begin{methoddesc}{show}
+Display the panel (which might have been hidden).
+\end{methoddesc}
+
+\begin{methoddesc}{top}
+Push panel to the top of the stack.
+\end{methoddesc}
+
+\begin{methoddesc}{userptr}
+Returns the user pointer for the panel.  This might be any Python object.
+\end{methoddesc}
+
+\begin{methoddesc}{window}
+Returns the window object associated with the panel.
+\end{methoddesc}