re added book image

Re added book.png so hopefully the live gh pages site can find and
display it now.
github being stupid

HORAAAY FOR .DS_STORE FILES!!!  now where did that ignore file option
run off to….
updated images for android

Had the same strange issues on live gh pages for android.  Could not
find certain images.  This should fix it.  Also replaced the logo with
the correct one from the ios version.