Photo: iFixit Apple appears to have improved water resistance in the new iPhone 6s and iPhone 6s Plus, according to an analysis and teardown by iFixit. While the iPhone still isn’t certified as even water-resistant, much less waterproof, iFixit reports that Apple appears to have taken steps to prevent water damage, such as adding a new gasket where the casing fits together and surrounding the logic board and its components with a new silicon…