Catch errors before loaded lib

[JosefJezek]

Does raven have solution for catch errors before installing as Google Analytics?

    // Initializes the analytics.js command queue.
    window.ga = window.ga||function(){(ga.q=ga.q||[]).push(arguments)};ga.l=+new Date;

    // Setup error tracking before anything else runs.
    window.onerror = function(message, file, lineNumber, columnNumber, error) {
      // We don't want to trigger any errors inside window.onerror, so wrap in a try/catch.
      try {
        // Some browsers don't support error param yet.
        if (error !== undefined) {
          message = error.stack;
        }
        ga('send', 'event', 'error', file + ':' + lineNumber, message);
      } catch (e) {
        // no-op
      }
    };

[kamilogorek]

Not yet, but we'll work on this soon. Duplicate of #169