Consistency: "{\bf ...}" ==> "\strong{...}"

"{\em ...}" ==> "\emph{...}"

	      Not at all sure what to do with "{\rm ...}".
	      Leaving it for now.

Doc/lib/libpanel.tex

@@ -10,7 +10,7 @@ Dutch author).
 This module should be used instead of the built-in module
 \code{pnl}
 to interface with the
-{\em Panel Library}.
+\emph{Panel Library}.
 
 The module is too large to document here in its entirety.
 One interesting function:
@@ -18,7 +18,7 @@ One interesting function:
 \renewcommand{\indexsubitem}{(in module panel)}
 \begin{funcdesc}{defpanellist}{filename}
 Parses a panel description file containing S-expressions written by the
-{\em Panel Editor}
+\emph{Panel Editor}
 that accompanies the Panel Library and creates the described panels.
 It returns a list of panel objects.
 \end{funcdesc}
@@ -49,7 +49,7 @@ For more details, read the module file.
 \bimodindex{pnl}
 
 This module provides access to the
-{\em Panel Library}
+\emph{Panel Library}
 built by NASA Ames (to get it, send e-mail to
 {\tt panel-request@nas.nasa.gov}).
 All access to it should be done through the standard module