Update providers.yml

added WiKID. Not sure about whether to add 2nd listing for the open-source community version, please feel free to edit as you see fit.
Add wikid icon
wikid.png

wikid.png
Delete wikid.png

delete
Merge branch 'patch-1' of https://github.com/nowen/twofactorauth
no message
remove wrong image
add correct image
correct image
Update providers.yml
Basecamp probably belongs in Communication

After all, Trello and Yammer are in there too.
Add Mandrill email service
Verify the provided image actually exists

Will catch typo’s
Add Mixpanel
Update social.yml

Google is able to login with sms, app and *phone call* :-)
Update backup.yml
Update payments.yml
Merge pull request #425 from jonny0303/patch-2

Update backup.yml
Merge pull request #426 from jonny0303/patch-3

Update payments.yml
Merge pull request #424 from jonny0303/patch-1

Update social.yml