Doxygen documentation. Fixed some erroneous image html params.

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@6259 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

FL/Fl_Menu_Bar.H

@@ -41,7 +41,7 @@
   top level menu defines the items in the menubar, while the submenus
   define the pull-down menus. Sub-sub menus and lower pop up to the right
   of the submenus. </P>
-  <P ALIGN=CENTER>\image html  src=</P>
+  <P ALIGN=CENTER>\image html  menubar.gif</P>
   <P>If there is an item in the top menu that is not a title of a
   submenu, then it acts like a &quot;button&quot; in the menubar.  Clicking on it
   will pick it. </P>

FL/Fl_Menu_Button.H

@@ -34,7 +34,7 @@
   This is a button that when pushed pops up a menu (or hierarchy of
   menus) defined by an array of 
   Fl_Menu_Item objects.
-  <P ALIGN=CENTER>\image html  src=</P>
+  <P ALIGN=CENTER>\image html  menu_button.gif</P>
   <P>Normally any mouse button will pop up a menu and it is lined up
   below the button as shown in the picture.  However an Fl_Menu_Button
   may also control a pop-up menu.  This is done by setting the type()

FL/Fl_Positioner.H

@@ -37,7 +37,7 @@
   It would be useful if this could be put atop another widget so that the
   crosshairs are on top, but this is not implemented.  The color of the
   crosshairs is selection_color().
-  <P ALIGN=CENTER>\image html  src=
+  <P ALIGN=CENTER>\image html  positioner.gif </P>
 */
 class FL_EXPORT Fl_Positioner : public Fl_Widget {
 

FL/Fl_Tabs.H

@@ -35,7 +35,7 @@
   interface that allows you to put lots and lots of buttons and
   switches in a panel, as popularized by many toolkits.
   
-  <P ALIGN=CENTER>\image html  src=</P>
+  <P ALIGN=CENTER>\image html  tabs.gif </P>
   
   <P>Clicking the tab makes a child visible() by calling
   show() on it, and all other children are made invisible

FL/Fl_Valuator.H

@@ -41,7 +41,7 @@
   and provides a consistent interface to set the value, range, and step,
   and insures that callbacks are done the same for every object.
   <P>There are probably more of these classes in FLTK than any others: </P>
-  <P ALIGN=CENTER>\image html  src=</P>
+  <P ALIGN=CENTER>\image html  valuators.gif</P>
   <P>In the above diagram each box surrounds an actual subclass.  These
   are further differentiated by setting the 
   type() of the widget to the symbolic value labeling the