Updated Year (markdown)

Year.md

@@ -1 +1,39 @@
-## Year
+### Retrieving year  
+**URI**: https://icarus-demo.com/api/v1/year/2  
+**Method**: Get  
+**Content type**: application/json  
+**Authorization**: Bearer ``token``  
+**Response body**:  
+```Json
+{
+    "id" : 2,
+    "year" : 2017,
+    "song_count" : 2
+}
+```
+  
+### Retrieving all years
+**URI**: https://icarus-demo.com/api/v1/year  
+**Method**: Get  
+**Content type**: application/json  
+**Authorization**: Bearer ``token``  
+**Response body**:  
+```Json
+[
+    {
+        "id" : 1,
+        "year" : 2012,
+        "song_count" : 1
+    },
+    {
+        "id" : 2,
+        "year" : 2017,
+        "song_count" : 2
+    },
+    {
+        "id" : 3,
+        "year" : 1995,
+        "song_count" : 1,
+    }
+]
+```