updated docs, closes #735

Signed-off-by: Vishal Rana <vr@labstack.com>

echo.go

@@ -29,9 +29,7 @@ Example:
     e.GET("/", hello)
 
     // Start server
-    if err := e.Start(":1323"); err != nil {
-      e.Logger.Fatal(err)
-    }
+    e.Logger.Fatal(e.Start(":1323"))
   }
 
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