title: Rasterio installation failing
body: <p>I am trying to update my rasterio version from 0.25 to 0.32 on a python 2.7 installation, but running up against foll. issue. Any info on how to fix it?</p>
  
  <pre><code> Running setup.py clean for rasterio
  Failed to build rasterio
  Installing collected packages: rasterio
    Found existing installation: rasterio 0.25.0
      Uninstalling rasterio-0.25.0:
        Successfully uninstalled rasterio-0.25.0
    Running setup.py install for rasterio: started
      Running setup.py install for rasterio: finished with status 'error'
      Complete output from command C:\Anaconda64\python.exe -u -c "import setuptools, tokenize;__file__='c:\\users\\rit\\appdata\\local\\temp\\pip-build-dvzvvz\\rasterio\\setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record c:\users\rit\appdata\local\temp\pip-4qousd-record\install-record.txt --single-version-externally-managed --compile:
      running install
      running build
      running build_py
      creating build
      creating build\lib.win-amd64-2.7
      creating build\lib.win-amd64-2.7\rasterio
      copying .\rasterio\coords.py -&gt; build\lib.win-amd64-2.7\rasterio
      copying .\rasterio\crs.py -&gt; build\lib.win-amd64-2.7\rasterio
      copying .\rasterio\dtypes.py -&gt; build\lib.win-amd64-2.7\rasterio
      copying .\rasterio\enums.py -&gt; build\lib.win-amd64-2.7\rasterio
      copying .\rasterio\errors.py -&gt; build\lib.win-amd64-2.7\rasterio
      copying .\rasterio\features.py -&gt; build\lib.win-amd64-2.7\rasterio
      copying .\rasterio\fill.py -&gt; build\lib.win-amd64-2.7\rasterio
      copying .\rasterio\five.py -&gt; build\lib.win-amd64-2.7\rasterio
      copying .\rasterio\profiles.py -&gt; build\lib.win-amd64-2.7\rasterio
      copying .\rasterio\sample.py -&gt; build\lib.win-amd64-2.7\rasterio
      copying .\rasterio\tool.py -&gt; build\lib.win-amd64-2.7\rasterio
      copying .\rasterio\transform.py -&gt; build\lib.win-amd64-2.7\rasterio
      copying .\rasterio\vfs.py -&gt; build\lib.win-amd64-2.7\rasterio
      copying .\rasterio\warnings.py -&gt; build\lib.win-amd64-2.7\rasterio
      copying .\rasterio\warp.py -&gt; build\lib.win-amd64-2.7\rasterio
      copying .\rasterio\__init__.py -&gt; build\lib.win-amd64-2.7\rasterio
      creating build\lib.win-amd64-2.7\rasterio\rio
      copying .\rasterio\rio\bands.py -&gt; build\lib.win-amd64-2.7\rasterio\rio
      copying .\rasterio\rio\calc.py -&gt; build\lib.win-amd64-2.7\rasterio\rio
      copying .\rasterio\rio\convert.py -&gt; build\lib.win-amd64-2.7\rasterio\rio
      copying .\rasterio\rio\features.py -&gt; build\lib.win-amd64-2.7\rasterio\rio
      copying .\rasterio\rio\helpers.py -&gt; build\lib.win-amd64-2.7\rasterio\rio
      copying .\rasterio\rio\info.py -&gt; build\lib.win-amd64-2.7\rasterio\rio
      copying .\rasterio\rio\main.py -&gt; build\lib.win-amd64-2.7\rasterio\rio
      copying .\rasterio\rio\merge.py -&gt; build\lib.win-amd64-2.7\rasterio\rio
      copying .\rasterio\rio\options.py -&gt; build\lib.win-amd64-2.7\rasterio\rio
      copying .\rasterio\rio\overview.py -&gt; build\lib.win-amd64-2.7\rasterio\rio
      copying .\rasterio\rio\sample.py -&gt; build\lib.win-amd64-2.7\rasterio\rio
      copying .\rasterio\rio\warp.py -&gt; build\lib.win-amd64-2.7\rasterio\rio
      copying .\rasterio\rio\__init__.py -&gt; build\lib.win-amd64-2.7\rasterio\rio
      creating build\lib.win-amd64-2.7\rasterio\tools
      copying .\rasterio\tools\mask.py -&gt; build\lib.win-amd64-2.7\rasterio\tools
      copying .\rasterio\tools\merge.py -&gt; build\lib.win-amd64-2.7\rasterio\tools
      copying .\rasterio\tools\__init__.py -&gt; build\lib.win-amd64-2.7\rasterio\tools
      running egg_info
      writing requirements to rasterio.egg-info\requires.txt
      writing rasterio.egg-info\PKG-INFO
      writing top-level names to rasterio.egg-info\top_level.txt
      writing dependency_links to rasterio.egg-info\dependency_links.txt
      writing entry points to rasterio.egg-info\entry_points.txt
      warning: manifest_maker: standard file '-c' not found
  
      reading manifest file 'rasterio.egg-info\SOURCES.txt'
      writing manifest file 'rasterio.egg-info\SOURCES.txt'
      running build_ext
      building 'rasterio._base' extension
      creating build\temp.win-amd64-2.7
      creating build\temp.win-amd64-2.7\Release
      creating build\temp.win-amd64-2.7\Release\rasterio
      C:\Users\rit\AppData\Local\Programs\Common\Microsoft\Visual C++ for Python\9.0\VC\Bin\amd64\cl.exe /c /nologo /Ox /MD /W3 /GS- /DNDEBUG -IC:\Anaconda64\lib\site-packages\numpy\core\include -IC:\Anaconda64\include -IC:\Anaconda64\PC /Tcrasterio/_base.c /Fobuild\temp.win-amd64-2.7\Release\rasterio/_base.obj
      _base.c
      rasterio/_base.c(263) : fatal error C1083: Cannot open include file: 'cpl_conv.h': No such file or directory
      error: command 'C:\\Users\\rit\\AppData\\Local\\Programs\\Common\\Microsoft\\Visual C++ for Python\\9.0\\VC\\Bin\\amd64\\cl.exe' failed with exit status 2
  
      ----------------------------------------
    Rolling back uninstall of rasterio
  </code></pre>