change actionmailer setting to use sendgrid
add default configs
using mailgun for sending email in production
change file permission

Signed-off-by: Donny Kurnia <donnykurnia@gmail.com>
upgrade to rails 3.2.11

Signed-off-by: Donny Kurnia <donnykurnia@gmail.com>
Merge branch 'release/0.0.4'