[SDK] Define CCoInit in shellutils
[HEADERS] Move some helpers from undocshell.h to shellutils.h as they didn't cover anything undocumented. Merge traycmd.h in undocshell.h as both contain just undocumented shell definitions.
[ACPPAGE] Enable version lies until Win7 + some cleanup
Git conversion: Make reactos the root directory, move rosapps, rostests, wallpapers into modules, and delete rossubsys.