* CONDA_ADDON: use patchelf instead of chrpath as it works better
  * CONDA_ADDON: improvement: early check for patch and patchelf
    see: issue #469
Merge pull request #12 from peter1000/addons

  * CONDA_ADDON: use patchelf instead of chrpath as it works better   * CONDA_ADDON: improvement: early check for patch and patchelf     see: issue #469