Add two dictionaries to htmlentitydefs: name2codepoint maps

HTML entity names to Unicode codepoints (as integers).
codepoint2name is the reverse mapping. From SF patch #722017.

Doc/lib/libhtmllib.tex

@@ -145,15 +145,27 @@ method without a preceding call to \method{save_bgn()} will raise a
 \modulesynopsis{Definitions of HTML general entities.}
 \sectionauthor{Fred L. Drake, Jr.}{fdrake@acm.org}
 
-This module defines a single dictionary, \code{entitydefs}, which is
+This module defines three dictionaries, \code{name2codepoint},
+\code{codepoint2name}, and \code{entitydefs}. \code{entitydefs} is
 used by the \refmodule{htmllib} module to provide the
 \member{entitydefs} member of the \class{HTMLParser} class.  The
-definition provided here contains all the entities defined by HTML 2.0 
+definition provided here contains all the entities defined by XHTML 1.0 
 that can be handled using simple textual substitution in the Latin-1
 character set (ISO-8859-1).
 
 
 \begin{datadesc}{entitydefs}
-  A dictionary mapping HTML 2.0 entity definitions to their
+  A dictionary mapping XHTML 1.0 entity definitions to their
   replacement text in ISO Latin-1.
+
+\end{datadesc}
+
+\begin{datadesc}{name2codepoint}
+  A dictionary that maps HTML entity names to the Unicode codepoints.
 \end{datadesc}
+
+\begin{datadesc}{codepoint2name}
+  A dictionary that maps Unicode codepoints to HTML entity names.
+\end{datadesc}
+
+

Misc/NEWS

@@ -103,6 +103,10 @@ Extension modules
 Library
 -------
 
+- htmlentitydefs has two new dictionaries: name2codepoint maps
+  HTML entity names to Unicode codepoints (as integers).
+  codepoint2name is the reverse mapping. See SF patch #722017.
+
 - pdb has a new command, "debug", which lets you step through
   arbitrary code from the debugger's (pdb) prompt.