Added config checking, event listeners, etc.

Can track added features by comparing TODO list.

app/data/config.yml

@@ -1,7 +1,15 @@
 '864651943820525609':
-  adminroles:
-  - 864661232005939280
-  modchannel: 865348933022515220
+  channels:
+    mod: 865348933022515220
+  configured: false
+  membership: {}
   name: Test
+  notifications:
+    help: null
+    signup: null
   owner: 493694762210033664
   prefix: '-'
+  roles:
+    admin:
+    - 864661232005939280
+  timeslots: []

app/data/config_blueprint.yml

@@ -0,0 +1,30 @@
+guild_id_string:
+  channels: # Dictionary
+    # help is an optional feature so not necessary in blueprint.
+    mod: 0
+    signup: 0
+  configured: false
+  membership: {} # Dictionary
+    # For membership, at least one kind needs to be defined. But no key is mandatory.
+  name: string
+  owner: 0
+  prefix: string
+  roles: # dictionary
+    admin:
+      - 0 # List
+      # For admins, at least one needs to be defined.
+    # committee notifications is optional so is not necessary in blueprint.
+    bots: 0
+    # newcomer role is optional
+    # returning player role is optional
+    # student role is optional
+  timeslots:
+      - string # List
+    # At least one needs to be defined.
+  meta:
+    strict:
+      - channels
+      - roles
+  notifications:
+    help: true
+    signup: true