[ci skip] Added Release-SSE2 configuration for the x64 platform to the Visual Studio solution.
[ci skip] Added Release-SSE2 configuration for the x64 platform to the Visual Studio solution.

As Visual Studio insists on adding the Release-SSE2|x64 combo every time we modify the solution, that combo now officially exists at the solution level, but is configured to actually build the Release|x64 combo of the individual projects.

POV-Ray/povray,POV-Ray/povray,LeForgeron/povray,eblanca/povray,eblanca/povray,LeForgeron/povray,wfpokorny/povray,c-lipka/povray,c-lipka/povray,wfpokorny/povray,eblanca/povray,POV-Ray/povray,BentSm/povray,wfpokorny/povray,wfpokorny/povray,c-lipka/povray,POV-Ray/povray,BentSm/povray,eblanca/povray,LeForgeron/povray,LeForgeron/povray,BentSm/povray,LeForgeron/povray,wfpokorny/povray,POV-Ray/povray,LeForgeron/povray,wfpokorny/povray,POV-Ray/povray,wfpokorny/povray,POV-Ray/povray,BentSm/povray,LeForgeron/povray,c-lipka/povray,LeForgeron/povray