Add a reference of weston.ini for ivi-shell and ivi-hmi-controller.

Signed-off-by: Nobuhiko Tanibata <NOBUHIKO_TANIBATA@xddp.denso.co.jp>
Modify example clients to support ivi-application.xml

Signed-off-by: Nobuhiko Tanibata <NOBUHIKO_TANIBATA@xddp.denso.co.jp>
ingnore data/wayland.png

Change-Id: I2f74d8e7842c9cb481f7758e0412875c069926f4
Reference implementation of input panel for ivi-shell.

The basement of this code is from input-panel.c of desktop shell.

Signed-off-by: Nobuhiko Tanibata <NOBUHIKO_TANIBATA@xddp.denso.co.jp>
Remove unused protocols.