Adds Jason Turner's recommended MSVC warnings

[cugone]

Adds the warnings recommended by Jason Turner for MSVC as Level 4 warnings. When Treat Warnings As Errors can be turned on, these will have to change to \weXXXXto take advantage of that.

The prior Add lint rules to MSVC PR is superseded by this as the default setting is the correct Native Recommended Ruleset, albeit analysis is turned off. Although, adding to NAS2D will have to occur separately.

MSVC-only change.

[DanRStevens]

Ok, I think I see what's going on here. Syntax is /w4nnnn, where only the last 4 digits are part of the error code. The leading 4 is the warning level it applies to. I was wondering at first why the numbers didn't seem to match what was in the thread.