BugFix: Fix-up bugs from last few commits...

Had left Heiko's name and the copyright text in the splash-screen after
adding to the overlaying message text - removed from background graphic.

Accidentally removed include of lua-yajl 'c' (exact name is OS dependent)
from TLuaInterpreter.cpp - replaced.

Made some mistakes with debug text output in a couple of places - corrected.

Signed-off-by: Stephen Lyons <slysven@virginmedia.com>