Feature/polidea team faces

I replaced Chuck Norris with profile pictures of Polidea employees. New coverflow shows all the avatars.
reading from stream byte by byte is very slow usually. It only gets really fast if you wrap the inputStream into BufferedInputStream (with appropriate buffer size ideally). I believe that we are not getting a buffered input stream here ( http://developer.android.com/reference/android/content/res/AssetManager.html#open(java.lang.String) is silent about what kind of stream we get) so it would be great to wrap it in buffered input stream.