message: feat: add option to specify root of jsxc
  If automatic detection fails, you can specify the path to jsxc via window.jsxc_public_path.
diff: @@ -2,6 +2,8 @@ let scriptElements = document.querySelectorAll('script[src$="' + __BUNDLE_NAME__
  if (scriptElements.length) {
  let src = (<HTMLScriptElement> scriptElements[0]).src;
  __webpack_public_path__ = src.substr(0, src.lastIndexOf('/') + 1);
  +} else if (typeof (<any> window).jsxc_public_path === 'string') {
  + __webpack_public_path__ = (<any> window).jsxc_public_path;
  } else {
  console.warn('Could not find script element which points to ' + __BUNDLE_NAME__ + '. JSXC is maybe not working correctly.');
  }
  