#388 Environment Variables on Windows do not update

After changing an environment variable, Launchy does not update it's local versions of these variables. The results is children processes of Launchy set out of variables.

A message is broadcasted, described here http://msdn.microsoft.com/en-us/library/ms682653%28VS.85%29.aspx and here http://msdn.microsoft.com/en-us/library/ms725497%28v=VS.85%29.aspx that could notify Launchy of new variables. It is also possible to scan HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Session Manager\Environment and HKEY_CURRENT_USER\Environment for new and changed variables.

Patch for environment update

I have provided a patch for the Qt version with functioning environment update.