/**
* @cfg {String} tmpDir (optional) where to put the temporary files.
* if you set this, then files will not be cleaned up
+ *
+ * at present we need tmpfiles - as we compile multiple files into one.
+ * we could do this in memory now, as I suspect vala will not be as bad as javascript for leakage...
+ *
*/
public string tmpDir = "/tmp"; // FIXME??? in ctor?