Add support for disqus

This will add support for disqus.

Closes manu-chroma#83

tests/test_data.yml

@@ -17,6 +17,14 @@ deviantart:
     - "john"
   available_usernames:
     - "zNRe3jx3isA8CoM"
+disqus:
+  invalid_usernames:
+    - "$very%long{invalid}user(name)"
+  taken_usernames:
+    - "seeeturtle"
+    - "john"
+  available_usernames:
+    - "zNRe3jx3isA8CoM"
 facebook:
   avatar_usernames:
     - "gyanlakhwani"

websites.yml

@@ -3,6 +3,7 @@ urls:
   asciinema: https://{w}.org/~{u}
   behance: https://{w}.net/{u}
   deviantart: https://{u}.{w}.com/
+  disqus: https://{w}.com/by/{u}
   facebook: https://mbasic.{w}.com/{u}
   medium: https://{w}.com/@{u}
   openhub: https://www.{w}.net/accounts/{u}
@@ -17,6 +18,7 @@ constant_usernames:
   asciinema: "john"
   behance: "seeeturtle"
   deviantart: "joshua"
+  disqus: "seeeturtle"
   facebook: "gyanlakhwani"
   github: "seeeturtle"
   gitlab: "andrewda"
@@ -47,6 +49,11 @@ username_patterns:
     invalid_patterns:
       - "^-"
       - "-$"
+  disqus:
+    characters: a-z0-9A-Z_
+    available_min_length: 5
+    min_length: 2
+    max_length: 30
   facebook:
     characters: a-z0-9A-Z.
     available_min_length: 6
@@ -118,6 +125,7 @@ avatar:
   asciinema: false
   behance: false
   deviantart: opengraph
+  disqus: opengraph
   facebook: opengraph
   github: opengraph
   gitlab: opengraph