Add PARTONS favicon and improve quality of logo #18

NumA++.doxyfile

@@ -1132,7 +1132,7 @@ HTML_EXTRA_STYLESHEET  = ../partons/doc/style/customdoxygen.css ../partons/doc/s
 # files will be copied as-is; there are no commands or markers available.
 # This tag requires that the tag GENERATE_HTML is set to YES.
 
-HTML_EXTRA_FILES       =
+HTML_EXTRA_FILES       = ../partons/doc/images/icon_partons.ico
 
 # The HTML_COLORSTYLE_HUE tag controls the color of the HTML output. Doxygen
 # will adjust the colors in the style sheet and background images according to