Added the API definition for creating or updating a template

rest-api-spec/api/indices.template.put.json

@@ -7,23 +7,24 @@
       "paths": ["/_template/{name}"],
       "parts": {
         "name": {
+          "type" : "string",
+          "required" : true,
+          "description" : "The name of the template"
         }
       },
       "params": {
-        "cause": {
-        },
-        "create": {
-        },
-        "name": {
-        },
         "order": {
-        },
+          "type" : "number",
-        "template": {
+          "description" : "The order for this template when merging multiple matching ones (higher numbers are merged later, overriding the lower numbers)"
         },
         "timeout": {
+          "type" : "time",
+          "description" : "Explicit operation timeout"
         }
       }
     },
-    "body": null
+    "body": {
+      "description" : "The template definition"
+    }
   }
 }