title: fiona import issues in python
body: <p>i have installed fiona using whl distributions.. but while importing i am getting following error :</p>
  
  <pre><code>---------------------------------------------------------------------------
  ImportError                               Traceback (most recent call last)
  &lt;ipython-input-1-b0161244e1be&gt; in &lt;module&gt;()
  ----&gt; 1 import fiona
        2 with fiona.open(r'C:\Users\harish.padi\Downloads\BSP\BSP\BSP_default_pred.shp', 'r') as input:
        3     with open(r'C:\Users\harish.padi\Downloads\BSP\BSP\output.txt', 'w') as output:
        4        for pt in input:
        5            id = pt['properties']['id']
  
  c:\program files\python36\lib\site-packages\fiona\__init__.py in &lt;module&gt;()
       75     pass
       76 
  ---&gt; 77 from fiona.collection import Collection, BytesCollection, vsi_path
       78 from fiona._drivers import driver_count, GDALEnv
       79 from fiona.drvsupport import supported_drivers
  
  c:\program files\python36\lib\site-packages\fiona\collection.py in &lt;module&gt;()
        7 
        8 from fiona import compat
  ----&gt; 9 from fiona.ogrext import Iterator, ItemsIterator, KeysIterator
       10 from fiona.ogrext import Session, WritingSession
       11 from fiona.ogrext import (
  
  ImportError: DLL load failed: The specified module could not be found.
  </code></pre>
  
  <p>can anyone suggest a solution.?</p>