fix popup so that tip shadow is not cut off

dist/leaflet.css

@@ -288,7 +288,7 @@
 .leaflet-popup-tip-container {
 	margin: 0 auto;
 	width: 40px;
-	height: 16px;
+	height: 20px;
 	position: relative;
 	overflow: hidden;
 	}

src/layer/Popup.js

@@ -12,7 +12,7 @@ L.Popup = L.Class.extend({
 		maxHeight: null,
 		autoPan: true,
 		closeButton: true,
-		offset: new L.Point(0, 2),
+		offset: new L.Point(0, 6),
 		autoPanPadding: new L.Point(5, 5),
 		className: ''
 	},

src/layer/vector/Path.Popup.js

@@ -3,10 +3,13 @@
  */
 
 L.Path.include({
+
 	bindPopup: function (content, options) {
+
 		if (!this._popup || this._popup.options !== options) {
 			this._popup = new L.Popup(options, this);
 		}
+
 		this._popup.setContent(content);
 
 		if (!this._openPopupAdded) {
@@ -17,6 +20,18 @@ L.Path.include({
 		return this;
 	},
 
+	openPopup: function (latlng) {
+
+		if (this._popup) {
+			latlng = latlng || this._latlng ||
+					this._latlngs[Math.floor(this._latlngs.length / 2)];
+
+			this._openPopup({latlng: latlng});
+		}
+
+		return this;
+	},
+
 	_openPopup: function (e) {
 		this._popup.setLatLng(e.latlng);
 		this._map.openPopup(this._popup);