[CMake] Dealing with dll PATH on Windows

[Bill Hoffman]

So, there is not much CMake can do for you.  The only thing you can do 
on windows is make sure that .exe and .dll files are all in the same 
directory.  Windows always looks first in the directory of the .exe for 
any .dll files it needs.  CMake can put the files in the same directory. 
  That is what we do for software development and distribution on Windows.

-Bill