The:: namespace for singletons

[Ian Monroe]

Mxcl has already outlined the benefits of the The:: singleton namespace at:
http://amarok.kde.org/wiki/Boring_2.0_Todo#Design_Patterns

I was wondering if there was any objections to just doing that now. I
guess the largest issue would be if anyone is sitting on uncommited
code.

Its no rush really, just thought it might be nice to have before we
work on the 2.0 port.