docs: update sourcetree

- add OpenCL state tracker Clover

- add XvMC state tracker

- remove progs
  directory got moved into its own repository mesa/demos

- remove vf
  directory removed with abda64efce73c18d49c74

docs/sourcetree.html

@@ -84,7 +84,6 @@ each directory.
         glBegin/glEnd, glDrawArrays, display lists, etc. goes through this
         module.  The results is a well-defined set of vertex arrays which
         are passed to the device driver (or tnl module) for rendering.
-    <li><b>vf</b> - vertex format conversion (currently unused)
     <li><b>x86</b> - Assembly code/optimizations for 32-bit x86 systems
         (not used with Gallium)
     <li><b>x86-64</b> - Assembly code/optimizations for 64-bit x86 systems
@@ -135,6 +134,7 @@ each directory.
       </ul>
     <li><b>state_trackers</b> -
        <ul>
+       <li><b>clover</b> - OpenCL state tracker
        <li><b>dri</b> - Meta state tracker for DRI drivers
        <li><b>egl</b> - Meta state tracker for EGL drivers
        <li><b>es</b> - OpenGL ES 1.x and 2.x state trackers
@@ -143,6 +143,7 @@ each directory.
        <li><b>vega</b> - OpenVG 1.x state tracker
        <li><b>wgl</b> -
        <li><b>xorg</b> - Meta state tracker for Xorg video drivers
+       <li><b>xvmc</b> - XvMC state tracker
        </ul>
     <li><b>winsys</b> -
        <ul>
@@ -157,7 +158,6 @@ each directory.
          direct rendering drivers.  It will dynamically load one of the 
          xxx_dri.so drivers.
   </ul>
-<li><b>progs</b> - OpenGL test and demonstration programs
 <li><b>lib</b> - where the GL libraries are placed
 </ul>