[Kde-bindings] Smoke library version numbers

[Richard Dale]

We've just been having a discussion on #kdebindings about the smoke lib 
version numbers. Pusling thinks that if we've made binary incompatible changes 
we should raise the major version from 2 to 3. I see the versions I have 
installed have gone up from 2.0.0 to 2.1.0, but that should mean that only 
functionality has been added, and not that the files are BIC. So really I think 
they shoujld be 3.0.0.

-- Richard