Adding template engine

Adding error handling
Adding basic SMTP class
core routing is working

system/vendor/h2o/nodes.php

@@ -0,0 +1,84 @@
+<?php
+/*
+		Nodes
+*/
+
+class H2o_Node {
+    var $position;
+	function __construct($argstring) {}
+	
+	function render($context, $stream) {}
+}
+
+class NodeList extends H2o_Node implements IteratorAggregate  {
+	var $parser;
+	var $list;
+	
+	function __construct(&$parser, $initial = null, $position = 0) {
+	    $this->parser = $parser;
+        if (is_null($initial))
+            $initial = array();
+        $this->list = $initial;
+        $this->position = $position;
+	}
+
+	function render($context, $stream) {
+		foreach($this->list as $node) {
+			$node->render($context, $stream);
+		}
+	}
+	
+    function append($node) {
+        array_push($this->list, $node);
+    }
+
+    function extend($nodes) {
+        array_merge($this->list, $nodes);
+    }
+
+    function getLength() {
+        return count($this->list);
+    }
+    
+    function getIterator() {
+        return new ArrayIterator( $this->list );
+    }
+}
+
+class VariableNode extends H2o_Node {
+    private $filters = array();
+    var $variable;
+    
+	function __construct($variable, $filters, $position = 0) {
+        if (!empty($filters))
+            $this->filters = $filters;
+		$this->variable = $variable;
+	}
+
+	function render($context, $stream) {
+        $value = $context->resolve($this->variable);
+        $value = $context->escape($value, $this->variable);
+        $stream->write($value);
+	}
+}
+
+class CommentNode extends H2o_Node {}
+
+class TextNode extends H2o_Node {
+    var $content;
+	function __construct($content, $position = 0) {
+		$this->content = $content;
+		$this->position = $position;
+	}
+	
+	function render($context, $stream) {
+		$stream->write($this->content);
+	}
+	
+	function is_blank() {
+	    return strlen(trim($this->content));
+	}
+}
+
+
+?>