Start refactoring of the trigger system:

- Move each trigger handler into its own file
- Add dictionary helper classes for easier reading and writing of dict-based data
- Extract the web hook payload -> internal representation building for each trigger system
- Add tests for this transformation
- Remove support for Github archived-based building

test/triggerjson/gitlab_webhook.json

@@ -0,0 +1,54 @@
+{
+  "object_kind": "push",
+  "before": "11fcaca195e8b17ca7e3dc47d9608d5b6b892f45",
+  "after": "fb88379ee45de28a0a4590fddcbd8eff8b36026e",
+  "ref": "refs/heads/master",
+  "checkout_sha": "fb88379ee45de28a0a4590fddcbd8eff8b36026e",
+  "message": null,
+  "user_id": 95973,
+  "user_name": "Jimmy Zelinskie",
+  "user_email": "jimmyzelinskie@gmail.com",
+  "project_id": 406414,
+  "repository": {
+    "name": "www-gitlab-com",
+    "url": "git@gitlab.com:jzelinskie/www-gitlab-com.git",
+    "description": "",
+    "homepage": "https://gitlab.com/jzelinskie/www-gitlab-com",
+    "git_http_url": "https://gitlab.com/jzelinskie/www-gitlab-com.git",
+    "git_ssh_url": "git@gitlab.com:jzelinskie/www-gitlab-com.git",
+    "visibility_level": 20
+  },
+  "commits": [
+    {
+      "id": "fb88379ee45de28a0a4590fddcbd8eff8b36026e",
+      "message": "Fix link\n",
+      "timestamp": "2015-08-13T19:33:18+00:00",
+      "url": "https://gitlab.com/jzelinskie/www-gitlab-com/commit/fb88379ee45de28a0a4590fddcbd8eff8b36026e",
+      "author": {
+        "name": "Sytse Sijbrandij",
+        "email": "sytse@gitlab.com"
+      }
+    },
+    {
+      "id": "4ca166bc0b511f21fa331873f260f1a7cb38d723",
+      "message": "Merge branch 'git-lfs' into 'master'\n\nGit lfs\n\n@JobV @dzaporozhets @DouweM please review the tone of this\n\nSee merge request !899\n",
+      "timestamp": "2015-08-13T15:52:15+00:00",
+      "url": "https://gitlab.com/jzelinskie/www-gitlab-com/commit/4ca166bc0b511f21fa331873f260f1a7cb38d723",
+      "author": {
+        "name": "Sytse Sijbrandij",
+        "email": "sytse@gitlab.com"
+      }
+    },
+    {
+      "id": "11fcaca195e8b17ca7e3dc47d9608d5b6b892f45",
+      "message": "Merge branch 'release-7-3-5' into 'master'\n\n7-13-5 Release post.\n\nSee merge request !900\n",
+      "timestamp": "2015-08-13T09:31:47+00:00",
+      "url": "https://gitlab.com/jzelinskie/www-gitlab-com/commit/11fcaca195e8b17ca7e3dc47d9608d5b6b892f45",
+      "author": {
+        "name": "Valery Sizov",
+        "email": "valery@gitlab.com"
+      }
+    }
+  ],
+  "total_commits_count": 3
+}