add min, max, step and list attributes (#28)

Author: Rjbaird

codegen/attr.json

@@ -131,16 +131,25 @@
 	{
 		"name": "lang"
 	},
+	{
+		"name": "list"
+	},
 	{
 		"name": "loop",
 		"value": "true"
 	},
+	{
+		"name": "max"
+	},
 	{
 		"name": "maxlength"
 	},
 	{
 		"name": "method"
 	},
+	{
+		"name": "min"
+	},
 	{
 		"name": "minlength"
 	},
@@ -177,6 +186,9 @@
 	{
 		"name": "src"
 	},
+	{
+		"name": "step"
+	},
 	{
 		"name": "style"
 	},