Heatmap layer support

Layer/HeatmapLayer.php

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+<?php
+
+namespace PHPGoogleMaps\Layer;
+
+use PHPGoogleMaps\Core\LatLng;
+use PHPGoogleMaps\Core\MapObject;
+
+/**
+ * Heatmap Layer
+ *
+ * @link https://developers.google.com/maps/documentation/javascript/heatmaplayer
+ */
+class HeatmapLayer extends MapObject
+{
+
+	/**
+	 * Constructor
+	 *
+	 * @param array $options Array of options
+	 */
+	public function __construct(array $options = null)
+	{
+		if ($options) {
+			unset($options['map']);
+			$this->options = $options;
+		}
+	}
+
+	/**
+	 * Add a Coordinate
+	 *
+	 * @param LatLng $latLng
+	 * @return void
+	 */
+	public function addLatLng(LatLng $latLng)
+	{
+		if (!isset($this->options['data'])) {
+			$this->options['data'] = array();
+		}
+		$this->options['data'][] = $latLng;
+	}
+
+}

Layer/HeatmapLayerDecorator.php

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+<?php
+
+namespace PHPGoogleMaps\Layer;
+
+/**
+ * Panoramio layer decorator
+ * 
+ * Decorate a panoramio layer after it has been added to a map
+ */
+
+
+class HeatmapLayerDecorator extends \PHPGoogleMaps\Core\MapObjectDecorator {
+
+	/**
+	 * Id of the HeatmapLayer layer in the map
+	 *
+	 * @var integer
+	 */
+	protected $_id;
+
+	/**
+	 * Map id the HeatmapLayer is attached to
+	 *
+	 * @var string
+	 */
+	protected $_map;
+
+	/**
+	 * Constructor
+	 * 
+	 * @param HeatmapLayer $heatmapLayer
+	 * @param int $id ID of the HeatmapLayer layer in the map
+	 * @param string $map Map Id of the map the HeatmapLayer is attached to
+	 */
+	public function __construct( HeatmapLayer $heatmapLayer, $id, $map ) {
+		parent::__construct( $heatmapLayer, array( '_id' => $id, '_map' => $map ) );
+	}
+
+	/**
+	 * Returns the javascript variable of the Heatmap layer
+	 * 
+	 * @return string
+	 */
+	public function getJsVar() {
+		return sprintf( '%s.heatmap_layers[%s]', $this->_map, $this->_id );
+	}
+
+}