eeze: Add sensor API

eeze: Add sensor API

Extend eeze to read out sensor data from various sources with a simple API to
access for application developers. The sensor backends are eina modules. For
now we support a tizen module as well as a fake module for testing.

Modules for plain sysfs on a desktop or other sensor frameworks could get
integrated.

The api is not fixed until 1.8 is out so let me know what you think. Having
small wrappers for all kind of infos like eeze_sensor_light_get or
eeze_sensor_proximity_get are possible but I did not want to bloat the api
from the beginning.

SVN revision: 76825