msvc: fixup for printf behavior and makefile/sln improvements (#184)
* msvc: forcedincludes added to fix/workaround MSC specific issues - printf interception allows redirecting printf() into the windows debugger "OutputDebugStringA" function. - forcedincludes allow doing this in a way that does not require any changes to the regular codebase or macro obfuscation for non-windows developers. * vcxproj: add MSC_SOURCES_H to the makefile to improve MSVC IDE search results. * vcxproj: add makefile-generated lutro_sources.props We can use CI steps to guard against errant human-modification of this file in the future, if warranted.