Fix bug 1071230: Update "let us know" link
Bug 1024507: Measure use of Twitter and Facebook

Luke organized the logic so that Google Analytics event calls would work
correctly [1]. His commit was squashed into the prior commit to maintain
a history of working commits.

[1] https://github.com/groovecoder/kuma/commit/4bbd5f89e3539faeecdcbdb850c45508e265b709
fix bug 1063830 - detect unmatched login in pre_social_login

redirect mis-matched social logins

send user back to signup with error message
bug 1063830 - fix and add pre_social_login tests
fix bug 1070942 - add a contribute.json file
Fix bug 1071743: Capitalize "other" radio option
Fix bug 1071748: Remove markup in page content
Merge pull request #2765 from openjck/1071743-capitalize-radio

Fix bug 1071743: Capitalize "other" radio option
fix bug 1071741 -- render the file list successfully and use correct feed URL.

This is a regression from 8b54bed209ade8ea63a514c69d8904679d497316.
Merge pull request #2766 from openjck/1071748-quote-bracket

Fix bug 1071748: Remove markup in page content
Merge pull request #2767 from jezdez/bug1071741-attachement-list

fix bug 1071741 -- render the file list successfully and use correct feed URL.
Fix bug 1071780: Don't notify after partial signup
Merge pull request #2734 from openjck/1024507-twitter-facebook-research

Bug 1024507: Measure use of Twitter and Facebook
Merge pull request #2761 from openjck/1071230-let-us-know-link

Fix bug 1071230: Update "let us know" link
fix bug 1072273 - use better language in some of the allauth messages.
Merge pull request #2759 from jezdez/bug1070942-contribute.json

fix bug 1070942 - add a contribute.json file
Merge pull request #2769 from openjck/1071780-registration-notice-on-abandonment

Fix bug 1071780: Don't notify after partial signup
Merge pull request #2751 from groovecoder/connect-with-unmatched-persona-1063830

fix bug 1063830 - detect unmatched login in pre_social_login
Merge pull request #2771 from jezdez/bug1072273

fix bug 1072273 - use better language in some of the allauth messages.
Bug 1043604: Add global Apache configuration

A new file is added, all-servers.conf, which contains Apache settings
that should be used on all servers. The file is hooked up to our local
environment via Puppet and the WebOps team will ensure that it's also
used on our public servers.