[CMake] FindQt.cmake for Qt4

[Clinton Stimpson]

With this discussion of how to handle versions of Qt in CMake...

I've got some code that compiles with both Qt3 and Qt4.  I don't want to 
be forced to include a FindQt3.cmake or FindQt4.cmake without really 
knowing what version someone wants to compile this code with.

So, can we at least have something to help here instead of forcing me to 
include a version specific FindQt*.cmake file?

Do we have version specific Find*.cmake files for anything else?

Thanks,
Clint