Remove paypal links and replace with mailto.
Remove paypal links and replace with mailto.

Signed-off-by: Pris Nasrat <b60d8dbad611d6fde4870580f4f9981b8f5c37b5@gmail.com>

gomex/devopsdays-web,gomex/devopsdays-web,gomex/devopsdays-web,gomex/devopsdays-web