Add info on how to handle media when DEBUG=False

Signed-off-by: Kaustav Das Modak <kaustav.dasmodak@yahoo.co.in>
Fixes Bug 719651 - Shifted http to https
Merge pull request #1466 from kaustavdm/readme_debug

Add info on how to handle media when DEBUG=False
[bug 881792] Add Mozillians field to user profile

Create a Mozillians profile field for adding link to user's Mozillians
page.

Need to add icon for Mozillians when displaying the link on user profile.

Signed-off-by: Kaustav Das Modak <kaustav.dasmodak@yahoo.co.in>
Merge pull request #1468 from sudheesh001/719651-profile-fields

Fixes Bug 719651 - Shifted http to https
Merge pull request #1469 from kaustavdm/mozillians-field-881792

[bug 881792] Add Mozillians field to user profile