Converted bitmaps to PNG (saving 600KB+), flattened any transparent PNGs in case of incompatible browsers/printing, and renamed a number of images to indicate what page it's used on.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@52297 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/doxygen/overviews/html.h

@@ -12,7 +12,7 @@
 
  The wxHTML library provides classes for parsing and displaying HTML.
  It is not intended to be a high-end HTML browser. If you are looking for
- something like that try http://www.mozilla.org.
+ something like that try <http://www.mozilla.org/>.
 
  wxHTML can be used as a generic rich text viewer - for example to display
  a nice About Box (like those of GNOME apps) or to display the result of
@@ -244,8 +244,10 @@
 
  Container is kind of cell that may contain sub-cells. Its size depends
  on number and sizes of its sub-cells (and also depends on width of window).
- See wxHtmlContainerCell, wxHtmlCell::Layout.
- This image shows the cells and containers: @image html contbox.bmp
+ See wxHtmlContainerCell, wxHtmlCell::Layout. This image shows the cells and
+ containers:
+
+ @image html overview_html_contbox.png
 
  @subsection overview_html_cells_conttaghandler Using Containers in Tag Handler
 
@@ -259,8 +261,9 @@
 
  Use wxHtmlWinParser::CloseContainer to close the container. 
  This doesn't create a new container with same depth level but it returns "control"
- to the parent container.
- See explanation: @image html cont.bmp
+ to the parent container. See explanation:
+
+ @image html overview_html_cont.png
 
  There clearly must be same number of calls to OpenContainer as to
  CloseContainer.
@@ -281,7 +284,9 @@
  m_WParser -> OpenContainer();
  @endcode
 
- and here is image of the situation: @image html hello.bmp
+ and here is image of the situation:
+
+ @image html overview_html_hello.png
 
  You can see that there was an opened container before the code was executed.
  We closed it, created our own container, then closed our container and opened