Create and edit a subreddit, get its settings

Signed-off-by: Vartan Benohanian <vartanbeno@gmail.com>

testdata/subreddit/settings.json

@@ -0,0 +1,57 @@
+{
+  "kind": "subreddit_settings",
+  "data": {
+    "default_set": true,
+    "toxicity_threshold_chat_level": 1,
+    "crowd_control_chat_level": 2,
+    "disable_contributor_requests": false,
+    "subreddit_id": "t5_test",
+    "allow_images": true,
+    "free_form_reports": true,
+    "domain": null,
+    "show_media": false,
+    "wiki_edit_age": 0,
+    "submit_text": "",
+    "allow_polls": false,
+    "title": "hello!",
+    "collapse_deleted_comments": false,
+    "wikimode": "modonly",
+    "over_18": false,
+    "allow_videos": true,
+    "spoilers_enabled": true,
+    "new_pinned_post_pns_enabled": true,
+    "crowd_control_mode": false,
+    "welcome_message_enabled": false,
+    "welcome_message_text": "",
+    "suggested_comment_sort": null,
+    "restrict_posting": true,
+    "original_content_tag_enabled": false,
+    "description": "sidebar",
+    "submit_link_label": "submit a link!",
+    "allow_galleries": true,
+    "allow_post_crossposts": false,
+    "spam_comments": "low",
+    "public_traffic": false,
+    "restrict_commenting": false,
+    "crowd_control_level": 0,
+    "submit_text_label": "submit a post!",
+    "all_original_content": false,
+    "spam_selfposts": "low",
+    "key_color": "",
+    "language": "en",
+    "wiki_edit_karma": 0,
+    "hide_ads": false,
+    "header_hover_text": "hello!",
+    "allow_chat_post_creation": true,
+    "allow_discovery": true,
+    "exclude_banned_modqueue": false,
+    "public_description": "description",
+    "show_media_preview": true,
+    "comment_score_hide_mins": 0,
+    "subreddit_type": "private",
+    "spam_links": "low",
+    "allow_predictions": false,
+    "user_flair_pns_enabled": true,
+    "content_options": "any"
+  }
+}