title: RuntimeError: To use MKL 2018 with Theano you MUST set "MKL_THREADING_LAYER=GNU"
body: <p>I have installed theano with </p>
  
  <pre><code>conda install theano
  </code></pre>
  
  <p>on Ubuntu 16.04.
  Now I have import problems</p>
  
  <pre><code>import theano
  Traceback (most recent call last):
    File "/home/milenko/miniconda3/lib/python3.6/configparser.py", line 1138, in _unify_values
      sectiondict = self._sections[section]
  KeyError: 'blas'
    File "/home/milenko/miniconda3/lib/python3.6/site-packages/theano/configdefaults.py", line 1252, in check_mkl_openmp
      raise RuntimeError('To use MKL 2018 with Theano you MUST set "MKL_THREADING_LAYER=GNU" in your environement.')
  RuntimeError: To use MKL 2018 with Theano you MUST set "MKL_THREADING_LAYER=GNU" in your environement.
  </code></pre>
  
  <p>What does this mean?How to check if everything if BLAS is properly installed?</p>