Added documentation for future build of the bindings in Windows

precompiled/win32-ia32/README.md

+## Building bindings for Windows
+
+When compiling the bindings for Windows, make sure to remove every instance of the following line from the Visual Studio project file (build/binding.vcxproj)
+
+```xml
+<RuntimeTypeInfo>false</RuntimeTypeInfo>
+```
+
+This line is known to cause some incompatibility with libsass and node.js.
\ No newline at end of file

precompiled/win32-x64/README.md

+## Building bindings for Windows
+
+When compiling the bindings for Windows, make sure to remove every instance of the following line from the Visual Studio project file (build/binding.vcxproj)
+
+```xml
+<RuntimeTypeInfo>false</RuntimeTypeInfo>
+```
+
+This line is known to cause some incompatibility with libsass and node.js.
\ No newline at end of file