feat: MathML.get/set_ID ( Fixes #9 )

Author: StartAutomating

Types/MathML/get_ID.ps1

@@ -0,0 +1,9 @@
+<#
+.SYNOPSIS
+    Gets a MathML id
+.DESCRIPTION
+    Gets the ID attribute on a MathML element.
+
+    MathML does not need to have an identifier, but it certainly can help.
+#>
+return $this.Math.id

Types/MathML/set_ID.ps1

@@ -0,0 +1,9 @@
+<#
+.SYNOPSIS
+    Sets a MathML id
+.DESCRIPTION
+    Sets the ID attribute on a MathML element.
+
+    MathML does not need to have an identifier, but it certainly can help.
+#>
+$this.Math.setAttribute("id", "$args")