Merge remote-tracking branch 'origin/master' into merge-upstream

Conflicts:
	.env.production.sample
	app/controllers/auth/confirmations_controller.rb
	db/schema.rb

Gemfile.lock

@@ -201,6 +201,7 @@ GEM
     hamster (3.0.0)
       concurrent-ruby (~> 1.0)
     hashdiff (0.3.7)
+    hashie (3.5.7)
     highline (1.7.10)
     hiredis (0.6.1)
     hkdf (0.3.0)
@@ -304,6 +305,16 @@ GEM
       sidekiq (>= 3.5.0)
       statsd-ruby (~> 1.2.0)
     oj (3.3.10)
+    omniauth (1.8.1)
+      hashie (>= 3.4.6, < 3.6.0)
+      rack (>= 1.6.2, < 3)
+    omniauth-cas (1.1.1)
+      addressable (~> 2.3)
+      nokogiri (~> 1.5)
+      omniauth (~> 1.2)
+    omniauth-saml (1.9.0)
+      omniauth (~> 1.3, >= 1.3.2)
+      ruby-saml (~> 1.4, >= 1.4.3)
     orm_adapter (0.5.0)
     ostatus2 (2.0.3)
       addressable (~> 2.5)
@@ -456,6 +467,8 @@ GEM
       unicode-display_width (~> 1.0, >= 1.0.1)
     ruby-oembed (0.12.0)
     ruby-progressbar (1.9.0)
+    ruby-saml (1.6.1)
+      nokogiri (>= 1.5.10)
     rufus-scheduler (3.4.2)
       et-orbi (~> 1.0)
     safe_yaml (1.0.4)
@@ -607,6 +620,9 @@ DEPENDENCIES
   nokogiri (~> 1.8)
   nsa (~> 0.2)
   oj (~> 3.3)
+  omniauth (~> 1.2)
+  omniauth-cas (~> 1.1)
+  omniauth-saml (~> 1.8)
   ostatus2 (~> 2.0)
   ox (~> 2.8)
   paperclip (~> 5.1)