Incorporated most of Emilo's changes. His VG changes lead to a panic from window server. It may be a circular deadlockproblem where Wserv is a client of EGL which is a client of Wserv, thus circular. Need to look at it further. I also fixed the arrangement of def files, and didn't take the VG mmp file changes, as I don't think they are appropriate to a stand alone real EGL implmentation. Still need to pull in Emilo's graphicscomposition changes.

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<relnotes schema="1.0.0" name="Surface Update" purpose="Provide a clean interface for updating surfaces for GCE" type="component">
  <revision date="20070309" major="1" functional="0" minor="0">
    <description>Baseline</description>
  </revision>
</relnotes>