Crank the gecko and json projects back down to W3.

Author: unknown

Gecko.vcproj

@@ -49,7 +49,7 @@
 				RuntimeLibrary="1"
 				TreatWChar_tAsBuiltInType="false"
 				UsePrecompiledHeader="0"
-				WarningLevel="4"
+				WarningLevel="3"
 				DebugInformationFormat="4"
 			/>
 			<Tool
@@ -114,7 +114,7 @@
 				EnableFunctionLevelLinking="true"
 				TreatWChar_tAsBuiltInType="false"
 				UsePrecompiledHeader="0"
-				WarningLevel="4"
+				WarningLevel="3"
 				DebugInformationFormat="3"
 			/>
 			<Tool