Added a template for line elements.

ignite-template.js

@@ -1417,6 +1417,19 @@ class circle extends IgniteTemplate {
     }
 }
 
+/**
+ * An ignite template that can be used to construct a line element.
+ */
+class line extends IgniteTemplate {
+    /** 
+     * @param  {...String|Number|IgniteProperty|IgniteTemplate} children A series of children to be added to this template.
+     */
+    constructor(...children) {
+        super("line", children);
+        this.tagNamespace = "http://www.w3.org/2000/svg";
+    }
+}
+
 /**
  * Html is a special template that can construct raw html or properties into the dom and automatically
  * update the dom if the property changes.
@@ -2298,5 +2311,6 @@ export {
     g,
     path,
     circle,
+    line,
     form
 };