Please replace pycrypto with pycryptodome (#63)

* Enable 3.6 and replace pycrypto with cryptodome

* Upgrade version number

.travis.yml

@@ -4,9 +4,10 @@ python:
   - "2.7"
   - "3.4"
   - "3.5"
+  - "3.6"
 install:
   - pip install six
-  - pip install pycrypto
+  - pip install pycryptodome
   - pip install chardet
 script:
   nosetests --nologcapture

pdfminer/__init__.py

@@ -1,6 +1,6 @@
 
 # -*- coding: utf-8 -*-
-__version__ = '20170419'
+__version__ = '20170510'
 
 if __name__ == '__main__':
     print (__version__)

setup.py

@@ -3,7 +3,7 @@ from setuptools import setup
 from pdfminer import __version__
 import sys
 
-requires = ['six', 'pycrypto']
+requires = ['six', 'pycryptodome']
 if sys.version_info >= (3, 0):
     requires.append('chardet')