fixed reference to correct image

Signed-off-by: Shwetank Dixit <emailshwetank@gmail.com>
deleted another image

Signed-off-by: Shwetank Dixit <emailshwetank@gmail.com>
moved cover image to proper location

Signed-off-by: Shwetank Dixit <emailshwetank@gmail.com>
Merge pull request #103 from shwetank/master

Fixed demo, moved and deleted needed images