[Fix bug 989292] Send email when member gets removed from group
Merge pull request #1115 from johngian/pr1058

[Fix bug 989292] Send email when member gets removed from group
[fix bug 1093322] Add Upper and Lower Sorbian in localized languages.
[fix bug 1098308] Add test coverage in mozillians.org .
[Fix bug 1076865] Add alternate email addresses in ExternalAccount.

* Add TYPE_EMAIL in ExternalAccount model.
* Exclude TYPE_EMAIL from external account formset.
* Exclude TYPE_EMAIL from accounts property.
* Implement various model properties as custom attributes.
Implement UserProfile privacy aware properties in __getattribute__ method.
Merge pull request #1100 from johngian/1076865-alternate-email

[Fix bug 1076865] Add alternate email addresses in ExternalAccount.
[Fix bug 1101488] Add http[s]://*.mozilla.org URLs in CSP policies.
Merge pull request #1117 from akatsoulas/1093322-add-languages

[fix bug 1093322] Add Upper and Lower Sorbian in localized languages.
Merge pull request #1116 from akatsoulas/1098308-test-coverage

[fix bug 1098308] Add test coverage in mozillians.org .
Merge pull request #1119 from johngian/fix-csp-errors

[Fix bug 1101488] Add http[s]://*.mozilla.org URLs in CSP policies.
[fix bug 1102559] Add element ID in verify email button.
Merge pull request #1121 from johngian/bug-1102559

[fix bug 1102559] Add element ID in verify email button.
[fix bug 1089894] Hide homepage links for non vouched users.