Comparison images, assets on the sdcard

[liaxim]

• create a script that pushes all the images and assets to some location on the sdcard
• update the tests to load from the sdcard and not bundle the images and the assets

The apk is too big already; slows down the development cycle. If there are no objections I will go ahead and make the changes some time in the near future.

[NolaDonato]

The asset tests read their input files from the internet. If we are going to do this type of script then we could include the assets we are currently getting from the network on the SD card. This will speed up the tests.