SSE2 4X zoomer for Visual Studio intrinsics

TODO: probably needs alignment check!
TODO: 2X and GCC versions!
whoops, didn't mean to include project file
further SSE2 scaler work

more scaler functions!
surface pixel buffers aligned to 128 bytes!
things may be broken...
unreinventing the wheel of aligned memory...
moved a bunch of code from Screen.cpp to Zoom.cpp
working on Windows now, looks good
adding Zoom.cpp to project file

Conflicts:
	src/OpenXcom.2010.vcxproj.filters

^O.o^
normalize iteration style in zoom functions