Merge branch 'master' into all-contributors/add-dgruntz

# Conflicts:
#	.all-contributorsrc
#	README.md

.all-contributorsrc

@@ -291,6 +291,24 @@
         "code"
       ]
     },
+    {
+      "login": "dgruntz",
+      "name": "Dominik Gruntz",
+      "avatar_url": "https://avatars0.githubusercontent.com/u/1516800?v=4",
+      "profile": "https://github.com/dgruntz",
+      "contributions": [
+        "code"
+      ]
+    },
+    {
+      "login": "hannespernpeintner",
+      "name": "Hannes",
+      "avatar_url": "https://avatars3.githubusercontent.com/u/1679437?v=4",
+      "profile": "https://bitbucket.org/hannespernpeintner/",
+      "contributions": [
+        "code"
+      ]
+    },
     {
       "login": "leogtzr",
       "name": "Leo Gutiérrez Ramírez",

README.md

@@ -148,6 +148,8 @@ This project is licensed under the terms of the MIT license.
   </tr>
   <tr>
     <td align="center"><a href="https://github.com/leogtzr"><img src="https://avatars0.githubusercontent.com/u/1211969?v=4" width="100px;" alt=""/><br /><sub><b>Leo Gutiérrez Ramírez</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=leogtzr" title="Code">💻</a></td>
+    <td align="center"><a href="https://bitbucket.org/hannespernpeintner/"><img src="https://avatars3.githubusercontent.com/u/1679437?v=4" width="100px;" alt=""/><br /><sub><b>Hannes</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=hannespernpeintner" title="Code">💻</a></td>
+    <td align="center"><a href="https://github.com/dgruntz"><img src="https://avatars0.githubusercontent.com/u/1516800?v=4" width="100px;" alt=""/><br /><sub><b>Dominik Gruntz</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=dgruntz" title="Code">💻</a></td>
   </tr>
 </table>