Updating the webp image to ensure the webpify function handles Android 4.1.2

I noticed some of the images (.png) where not displayed correctly on my android device 4.1.2.
Changing the image:data, allowed me to get the proper image loading on my 3 Android test devices.
I assume it is due to the following "(Lossless, Transparency, Android 4.2.1+)" http://developer.android.com/guide/appendix/media-formats.html