adding pipfile in order to promote installation with pipenv as reques…

…ted from algolia/docsearch#449 waiting for pypa/pipenv#2956

Pipfile

@@ -0,0 +1,53 @@
+[[source]]
+url = "https://pypi.org/simple"
+verify_ssl = true
+name = "pypi"
+
+[packages]
+algoliasearch = "==1.13.0"
+"asn1crypto" = "==0.22.0"
+attrs = "==17.2.0"
+certifi = "==2017.7.27.1"
+cffi = "==1.11.0"
+chardet = "==3.0.4"
+click = "==6.7"
+constantly = "==15.1.0"
+cryptography = "==2.0.3"
+cssselect = "==1.0.1"
+"enum34" = "==1.1.6"
+future = "==0.16.0"
+hyperlink = "==17.3.1"
+idna = "==2.6"
+incremental = "==17.5.0"
+ipaddress = "==1.0.18"
+lxml = "==4.0.0"
+ndg-httpsclient = "==0.4.3"
+ordereddict = "==1.1"
+parsel = "==1.2.0"
+"pyasn1" = "==0.3.5"
+"pyasn1-modules" = "==0.1.4"
+pycparser = "==2.18"
+pyperclip = "==1.5.27"
+python-dotenv = "==0.7.1"
+queuelib = "==1.4.2"
+ratelimit = "==1.4.1"
+requests = "==2.18.4"
+requests-file = "==1.4.2"
+selenium = "==2.53.6"
+six = "==1.11.0"
+slacker = "==0.9.60"
+tldextract = "==2.1.0"
+"urllib3" = "==1.22"
+"w3lib" = "==1.18.0"
+Automat = "==0.6.0"
+PyDispatcher = "==2.0.5"
+pyOpenSSL = "==17.3.0"
+Scrapy = "==1.5.0"
+service_identity = "==17.0.0"
+Twisted = "==17.5.0"
+"zope.interface" = "==4.4.2"
+
+[dev-packages]
+
+[requires]
+python_version = "2.7"