ReactOS source code tree restructure

ReactOS source code tree restructuration: we really need it! (now that we use CMake and the previous arguments do not hold anymore).

For more details, see:
http://www.reactos.org/pipermail/ros-dev/2010-July/thread.html and http://www.reactos.org/pipermail/ros-dev/2010-July/013257.html and following;
http://www.reactos.org/forum/viewtopic.php?p=102258&sid=ef8d6c9a27f9e3800b7dff87afdc5919
http://www.reactos.org/wiki/Techwiki:File_Layout
http://svn.reactos.org/svn/reactos/branches/Tree-restructure-test/?view=log

And for information, the NT source tree as seen from the Sysinternals guys:
NT 5.0 Beta 2: https://web.archive.org/web/20001102052024/http://sysinternals.com/nt5src.htm
XP Beta 2: https://web.archive.org/web/20061105012217/http://www.sysinternals.com/Information/WindowsXpSourceTree.html

From BetaArchive (thanks raijinzrael for the link ): http://www.betaarchive.com/forum/viewtopic.php?p=353277#p353277
and NT 3.1 Beta Install tree: http://pastebin.com/WzymjzTP

http://en.wikipedia.org/wiki/List_of_Microsoft_Windows_components