text: Title: Pillow (4.3.0) for manylinux1 is not packaged, instead zappa packages Pillow for Windows 64-bit
  Body: This is almost related to #398 / #841 , but instead no Pillow is packaged at all.
  
  ## Context
  
  Python 3.6 on Windows (Anaconda)
  
  ## Expected Behavior
  
  Pillow 4.3.0 is packaged. It seems that lambda-packages doesn't have pillow 4.3.0 yet, only 3.4.2 (https://github.com/Miserlou/lambda-packages/tree/master/lambda_packages/Pillow), however there is a [manylinux wheel](https://pypi.python.org/pypi/Pillow/4.3.0): Pillow-4.3.0-cp36-cp36m-manylinux1_x86_64.whl which should be usable, right ?
  
  
  ## Actual Behavior
  
  Pillow 4.3.0 is not packaged, and instead zappa uses PIL for Windows 64bit:
  
  ![image](https://user-images.githubusercontent.com/24123/33804149-77f8130c-ddd1-11e7-918c-e409d1a77171.png)
  
  Pillow-4.3.0.dist-info exists:
  
  ![image](https://user-images.githubusercontent.com/24123/33804386-179d3b2c-ddd6-11e7-9092-4c994edb3bc6.png)
  
  `WHEEL` contains:
  
  ```
  Wheel-Version: 1.0
  Generator: bdist_wheel (0.30.0)
  Root-Is-Purelib: false
  Tag: cp36-cp36m-win_amd64
  ```
  
  ## Possible Fix
  
  Patch the zip and use the manylinux wheel manually?
  
  ## Steps to Reproduce
  
  On Windows 64-bit:
  
  ```
  pip install Pillow
  ```
  
  ## Your Environment
  
  * Zappa version used: zappa==0.45.1
  * Operating System and Python version: Windows 10 64-bit, Python 3.6
  * The output of `pip freeze`: 
  
  ```
  argcomplete==1.9.2
  Babel==2.5.1
  base58==0.2.4
  boto==2.48.0
  boto3==1.4.8
  botocore==1.8.11
  cachetools==2.0.1
  certifi==2017.11.5
  cfn-flip==0.2.5
  chardet==3.0.4
  click==6.7
  decorator==4.1.2
  Django==2.0
  django-appconf==1.0.2
  django-imagekit==4.0.2
  django-ipware==1.1.6
  django-nine==0.1.13
  django-phonenumber-field==1.3.0
  django-qartez==0.7.1
  django-s3-storage==0.12.1
  docutils==0.14
  durationpy==0.5
  future==0.16.0
  google-auth==1.2.1
  hjson==3.0.1
  httplib2==0.10.3
  idna==2.6
  jmespath==0.9.3
  kappa==0.6.0
  lambda-packages==0.19.0
  oauth2client==4.1.2
  olefile==0.44
  phonenumberslite==8.8.5
  pilkit==2.0
  Pillow==4.3.0
  placebo==0.8.1
  psycopg2==2.7.3.2
  pyasn1==0.4.2
  pyasn1-modules==0.2.1
  python-dateutil==2.6.1
  python-slugify==1.2.4
  pytz==2017.3
  PyYAML==3.12
  ratelim==0.1.6
  requests==2.18.4
  rsa==3.4.2
  s3transfer==0.1.12
  six==1.11.0
  toml==0.9.3
  tqdm==4.19.1
  troposphere==2.1.2
  Unidecode==0.4.21
  uritemplate==3.0.0
  urllib3==1.22
  Werkzeug==0.12
  wsgi-request-logger==0.4.6
  zappa==0.45.1
  ```
  
  * Your `zappa_settings.py`: (Note: this should be `zappa_settings.json`, perhaps you want to change the template?)
  
  ```
  {
      "prd": {
          "aws_region": "us-east-1",
          "django_settings": "samaraweb.settings",
          "profile_name": "default",
          "project_name": "samaraweb",
          "runtime": "python3.6",
          "s3_bucket": "samaraedu-code",
          "domain": "keluargasamara.com",
          "certificate_arn": "arn:aws:acm:us-east-1:703881650703:certificate/a5683018-90ee-4e47-b59b-bc0d147ed174",
          "route53_enabled": false,
          "exclude": ["snapshot"]
      }
  }
  ```