A reference implementation how to use ivi-layout internal APIs

The library is used to manage layout of surfaces/layers. Layout change is
triggered by ivi-hmi-controller protocol, ivi-hmi-controller.xml. A reference
how to use the protocol, see hmi-controller-homescreen.

In-Vehicle Infotainment system usually manage properties of surfaces/layers
by only a central component which decide where surfaces/layers shall be. This
reference show examples to implement the central component as a module of
weston.

Default Scene graph of UI is defined in hmi_controller_create. It consists of
- In the bottom, a base layer to group surfaces of background, panel,
  and buttons
- Next, a application layer to show application surfaces.
- Workspace background layer to show a surface of background image.
- Workspace layer to show launcher to launch application with icons. Paths to
  binary and icon are defined in weston.ini. The width of this layer is longer
  than the size of screen because a workspace has several pages and is
  controlled by motion of input.

Signed-off-by: Nobuhiko Tanibata <NOBUHIKO_TANIBATA@xddp.denso.co.jp>
A reference implementation of UI client how to use ivi-hmi-controller.

This is launched from hmi-controller by using hmi_client_start and create a
pthread.

The basic flow is as followed,
1/ create pthread
2/ read configuration from weston.ini.
3/ draw png file to surface according to configuration of weston.ini
4/ set up UI by using ivi-hmi-controller protocol
5/ Enter event loop
6/ If a surface receives touch/pointer event, followings are invoked according
   to type of event and surface
6-1/ If a surface to launch ivi_application receive touch up, it execs
     ivi-application configured in weston.ini.
6-2/ If a surface to switch layout mode receive touch up, it sends a request,
     ivi_hmi_controller_switch_mode, to hmi-controller.
6-3/ If a surface to show workspace having launchers, it sends a request,
     ivi_hmi_controller_home, to hmi-controller.
6-4/ If touch down events happens in workspace,
     ivi_hmi_controller_workspace_control is sent to slide workspace.
     When control finished, event: ivi_hmi_controller_workspace_end_control
     is received.

Signed-off-by: Nobuhiko Tanibata <NOBUHIKO_TANIBATA@xddp.denso.co.jp>
Add refernce image files for ivi-hmi-controller

Signed-off-by: Nobuhiko Tanibata <NOBUHIKO_TANIBATA@xddp.denso.co.jp>
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>
Add client example, weston-editor-ivi, to verify input-panel for ivi-shell

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

Change-Id: I2f74d8e7842c9cb481f7758e0412875c069926f4
Support simple-shm

Change-Id: Ie5698620d07bbcc1b249f6d8019efb61020199e8
simple-egl support

Change-Id: I09383fe08222a9cc5e30dc53f703774f2ef3cf4b
Support window

Change-Id: Ic01c78cab538f3ad602763b56255a930367da5bc
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>