fontSettings doc added

Signed-off-by: Shwetank Dixit <emailshwetank@gmail.com>
power api doc added

Signed-off-by: Shwetank Dixit <emailshwetank@gmail.com>
proxy api doc added

Signed-off-by: Shwetank Dixit <emailshwetank@gmail.com>
Proxy API Tutorial added

Signed-off-by: Shwetank Dixit <emailshwetank@gmail.com>
identity api doc added

Signed-off-by: Shwetank Dixit <emailshwetank@gmail.com>