ring implementation

ring implementation

Ring is the view that shows up on alarm or timer's timeout.
The style of the view depends on the type of the ring. If
ring view was called by alarm it shows the alarm info,
otherwise is called by timer and shows time counter. Ring
is created on app_control request with proper operation set
from the following:

http://tizen.org/appcontrol/operation/alarm
http://tizen.org/appcontrol/operation/timeout

Commit implements:
- ring view with alarm data content or counter,
- ring presenter due to MVP pattern,
- ring model which is created and used only if ring shows up
on timer's call.
- ring controller to create ring presenter, view and model
adjusted to the type of the requested call.

Change-Id: Ice190b3b47c3aa8deb69bf37dd6a7506e1f37bc1