[Presentation] Added presentation for Barcamp Goa 2011

Signed-off-by: Aniket Pant <me@aniketpant.com>
[Presentation] Added presentation for WordCamp Jabalpur 2011

Signed-off-by: Aniket Pant <me@aniketpant.com>
[Presentation] Added presentation for Barcamp Goa 2013

Signed-off-by: Aniket Pant <me@aniketpant.com>
[Presentation] Added presentation for WordCamp Pune 2013

Signed-off-by: Aniket Pant <me@aniketpant.com>