package/cegui06: new package

Although there are more recent versions of CEGUI, we are stuck
with 0.6.2b for use by spice.

[Peter: add C++ dependency]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Arnout Vandecappelle <arnout@mind.be>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>