[WIP] Test transmogrifier

Introduce MobilizonWeb.API namespace

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

Format

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

WIP

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

remove unneeded code

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

Fix tests

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

Fix warnings

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

test/fixtures/mastodon-unfollow-activity.json

@@ -0,0 +1,34 @@
+{
+   "@context":[
+      "https://www.w3.org/ns/activitystreams",
+      "https://w3id.org/security/v1",
+      {
+         "toot":"http://joinmastodon.org/ns#",
+         "sensitive":"as:sensitive",
+         "ostatus":"http://ostatus.org#",
+         "movedTo":"as:movedTo",
+         "manuallyApprovesFollowers":"as:manuallyApprovesFollowers",
+         "inReplyToAtomUri":"ostatus:inReplyToAtomUri",
+         "conversation":"ostatus:conversation",
+         "atomUri":"ostatus:atomUri",
+         "Hashtag":"as:Hashtag",
+         "Emoji":"toot:Emoji"
+      }
+   ],
+   "signature":{
+      "type":"RsaSignature2017",
+      "signatureValue":"Kn1/UkAQGJVaXBfWLAHcnwHg8YMAUqlEaBuYLazAG+pz5hqivsyrBmPV186Xzr+B4ZLExA9+SnOoNx/GOz4hBm0kAmukNSILAsUd84tcJ2yT9zc1RKtembK4WiwOw7li0+maeDN0HaB6t+6eTqsCWmtiZpprhXD8V1GGT8yG7X24fQ9oFGn+ng7lasbcCC0988Y1eGqNe7KryxcPuQz57YkDapvtONzk8gyLTkZMV4De93MyRHq6GVjQVIgtiYabQAxrX6Q8C+4P/jQoqdWJHEe+MY5JKyNaT/hMPt2Md1ok9fZQBGHlErk22/zy8bSN19GdG09HmIysBUHRYpBLig==",
+      "creator":"https://social.tcit.fr/users/tcit#main-key",
+      "created":"2018-02-17T13:29:31Z"
+   },
+   "type":"Undo",
+   "object":{
+      "type":"Follow",
+      "object":"http://localtesting.pleroma.lol/users/lain",
+      "nickname":"lain",
+      "id":"https://social.tcit.fr/users/tcit#follows/2",
+      "actor":"https://social.tcit.fr/users/tcit"
+   },
+   "actor":"https://social.tcit.fr/users/tcit",
+   "id": "https://social.tcit.fr/users/tcit#follow/2/undo"
+}