Added images to res/images.

diff --git a/res/images/aeroplane_icon_gray.png b/res/images/aeroplane_icon_gray.png
new file mode 100755 (executable)
index 0000000..e491967
Binary files /dev/null and b/res/images/aeroplane_icon_gray.png differ

diff --git a/res/images/car_icon_gray.png b/res/images/car_icon_gray.png
new file mode 100755 (executable)
index 0000000..ca64e67
Binary files /dev/null and b/res/images/car_icon_gray.png differ

diff --git a/res/images/rocket_icon_gray.png b/res/images/rocket_icon_gray.png
new file mode 100755 (executable)
index 0000000..d745ec1
Binary files /dev/null and b/res/images/rocket_icon_gray.png differ

diff --git a/res/images/walk_icon_gray.png b/res/images/walk_icon_gray.png
new file mode 100755 (executable)
index 0000000..c6c4ba9
Binary files /dev/null and b/res/images/walk_icon_gray.png differ