Jump to python library files outside of VFS dir

package.json

@@ -55,7 +55,7 @@
         "c9"
     ],
     "c9plugins": {
-        "c9.ide.language": "#3f60864d0d",
+        "c9.ide.language": "#482a102bea",
         "c9.ide.language.css": "#a649f2a710",
         "c9.ide.language.generic": "#77d43cfaf0",
         "c9.ide.language.html": "#0f4078c187",
@@ -90,7 +90,7 @@
         "c9.ide.imgeditor": "#612e75ef4f",
         "c9.ide.immediate": "#a962119bec",
         "c9.ide.installer": "#0fde9f0067",
-        "c9.ide.language.python": "#49c1fa40db",
+        "c9.ide.language.python": "#33ff958961",
         "c9.ide.mount": "#b9a5a2d45c",
         "c9.ide.navigate": "#38ae100ea1",
         "c9.ide.newresource": "#981a408a7b",

plugins/c9.ide.editors/tabmanager.js

@@ -1101,6 +1101,11 @@ define(function(require, module, exports) {
                     tab.classList.add("error");
                     tab.document.meta.error = true;
                     
+                    if (tab.document.meta.closeOnError) {
+                        tab.close();
+                        return callback && callback(err);
+                    }
+                    
                     alert("Error opening file", 
                         "Could not open file: " + tab.path,
                         err.code == "ENOENT"