Add Pipfile to project for using with pipenv

- Also upgrade all packages to latest version

Pipfile

+[[source]]
+
+url = "https://pypi.python.org/simple"
+verify_ssl = true
+name = "pypi"
+
+
+[packages]
+
+dj-database-url = "==0.4.2"
+django = "==2.0"
+gunicorn = "==19.7.1"
+"psycopg2" = "==2.7.3.2"
+whitenoise = "==3.3.1"
+
+
+[dev-packages]
+

Pipfile.lock

+{
+    "_meta": {
+        "hash": {
+            "sha256": "b785c7a0271af685b283e81e66e4dc2f7136cd50c80fb95d5af27c54e8152a20"
+        },
+        "host-environment-markers": {
+            "implementation_name": "cpython",
+            "implementation_version": "3.6.4",
+            "os_name": "posix",
+            "platform_machine": "x86_64",
+            "platform_python_implementation": "CPython",
+            "platform_release": "17.2.0",
+            "platform_system": "Darwin",
+            "platform_version": "Darwin Kernel Version 17.2.0: Fri Sep 29 18:27:05 PDT 2017; root:xnu-4570.20.62~3/RELEASE_X86_64",
+            "python_full_version": "3.6.4",
+            "python_version": "3.6",
+            "sys_platform": "darwin"
+        },
+        "pipfile-spec": 6,
+        "requires": {},
+        "sources": [
+            {
+                "name": "pypi",
+                "url": "https://pypi.python.org/simple",
+                "verify_ssl": true
+            }
+        ]
+    },
+    "default": {
+        "dj-database-url": {
+            "hashes": [
+                "sha256:e16d94c382ea0564c48038fa7fe8d9c890ef1ab1a8ec4cb48e732c124b9482fd",
+                "sha256:a6832d8445ee9d788c5baa48aef8130bf61fdc442f7d9a548424d25cd85c9f08"
+            ],
+            "version": "==0.4.2"
+        },
+        "django": {
+            "hashes": [
+                "sha256:af18618ce3291be5092893d8522fe3919661bf3a1fb60e3858ae74865a4f07c2",
+                "sha256:9614851d4a7ff8cbd32b73c6076441f377c45a5bbff7e771798fb02c43c31f47"
+            ],
+            "version": "==2.0"
+        },
+        "gunicorn": {
+            "hashes": [
+                "sha256:75af03c99389535f218cc596c7de74df4763803f7b63eb09d77e92b3956b36c6",
+                "sha256:eee1169f0ca667be05db3351a0960765620dad53f53434262ff8901b68a1b622"
+            ],
+            "version": "==19.7.1"
+        },
+        "psycopg2": {
+            "hashes": [
+                "sha256:594aa9a095de16614f703d759e10c018bdffeafce2921b8e80a0e8a0ebbc12e5",
+                "sha256:1cf5d84290c771eeecb734abe2c6c3120e9837eb12f99474141a862b9061ac51",
+                "sha256:0344b181e1aea37a58c218ccb0f0f771295de9aa25a625ed076e6996c6530f9e",
+                "sha256:25250867a4cd1510fb755ef9cb38da3065def999d8e92c44e49a39b9b76bc893",
+                "sha256:317612d5d0ca4a9f7e42afb2add69b10be360784d21ce4ecfbca19f1f5eadf43",
+                "sha256:9d6266348b15b4a48623bf4d3e50445d8e581da413644f365805b321703d0fac",
+                "sha256:ddca39cc55877653b5fcf59976d073e3d58c7c406ef54ae8e61ddf8782867182",
+                "sha256:988d2ec7560d42ef0ac34b3b97aad14c4f068792f00e1524fa1d3749fe4e4b64",
+                "sha256:7a9c6c62e6e05df5406e9b5235c31c376a22620ef26715a663cee57083b3c2ea",
+                "sha256:7a75565181e75ba0b9fb174b58172bf6ea9b4331631cfe7bafff03f3641f5d73",
+                "sha256:94e4128ba1ea56f02522fffac65520091a9de3f5c00da31539e085e13db4771b",
+                "sha256:92179bd68c2efe72924a99b6745a9172471931fc296f9bfdf9645b75eebd6344",
+                "sha256:b9358e203168fef7bfe9f430afaed3a2a624717a1d19c7afa7dfcbd76e3cd95c",
+                "sha256:009e0bc09a57dbef4b601cb8b46a2abad51f5274c8be4bba276ff2884cd4cc53",
+                "sha256:d3ac07240e2304181ffdb13c099840b5eb555efc7be9344503c0c03aa681de79",
+                "sha256:40fa5630cd7d237cd93c4d4b64b9e5ed9273d1cfce55241c7f9066f5db70629d",
+                "sha256:6c2f1a76a9ebd9ecf7825b9e20860139ca502c2bf1beabf6accf6c9e66a7e0c3",
+                "sha256:37f54452c7787dbdc0a634ca9773362b91709917f0b365ed14b831f03cbd34ba",
+                "sha256:8f5942a4daf1ffac42109dc4a72f786af4baa4fa702ede1d7c57b4b696c2e7d6",
+                "sha256:bf708455cd1e9fa96c05126e89a0c59b200d086c7df7bbafc7d9be769e4149a3",
+                "sha256:82c40ea3ac1555e0462803380609fbe8b26f52620f3d4f8eb480cfd8ceed8a14",
+                "sha256:207ba4f9125a0a4200691e82d5eee7ea1485708eabe99a07fc7f08696fae62f4",
+                "sha256:0cd4c848f0e9d805d531e44973c8f48962e20eb7fc0edac3db4f9dbf9ed5ab82",
+                "sha256:57baf63aeb2965ca4b52613ce78e968b6d2bde700c97f6a7e8c6c236b51ab83e",
+                "sha256:2954557393cfc9a5c11a5199c7a78cd9c0c793a047552d27b1636da50d013916",
+                "sha256:7c31dade89634807196a6b20ced831fbd5bec8a21c4e458ea950c9102c3aa96f",
+                "sha256:1286dd16d0e46d59fa54582725986704a7a3f3d9aca6c5902a7eceb10c60cb7e",
+                "sha256:697ff63bc5451e0b0db48ad205151123d25683b3754198be7ab5fcb44334e519",
+                "sha256:fc993c9331d91766d54757bbc70231e29d5ceb2d1ac08b1570feaa0c38ab9582",
+                "sha256:9d64fed2681552ed642e9c0cc831a9e95ab91de72b47d0cb68b5bf506ba88647",
+                "sha256:5c3213be557d0468f9df8fe2487eaf2990d9799202c5ff5cb8d394d09fad9b2a"
+            ],
+            "version": "==2.7.3.2"
+        },
+        "pytz": {
+            "hashes": [
+                "sha256:80af0f3008046b9975242012a985f04c5df1f01eed4ec1633d56cc47a75a6a48",
+                "sha256:feb2365914948b8620347784b6b6da356f31c9d03560259070b2f30cff3d469d",
+                "sha256:59707844a9825589878236ff2f4e0dc9958511b7ffaae94dc615da07d4a68d33",
+                "sha256:d0ef5ef55ed3d37854320d4926b04a4cb42a2e88f71da9ddfdacfde8e364f027",
+                "sha256:c41c62827ce9cafacd6f2f7018e4f83a6f1986e87bfd000b8cfbd4ab5da95f1a",
+                "sha256:8cc90340159b5d7ced6f2ba77694d946fc975b09f1a51d93f3ce3bb399396f94",
+                "sha256:dd2e4ca6ce3785c8dd342d1853dd9052b19290d5bf66060846e5dc6b8d6667f7",
+                "sha256:699d18a2a56f19ee5698ab1123bbcc1d269d061996aeb1eda6d89248d3542b82",
+                "sha256:fae4cffc040921b8a2d60c6cf0b5d662c1190fe54d718271db4eb17d44a185b7"
+            ],
+            "version": "==2017.3"
+        },
+        "whitenoise": {
+            "hashes": [
+                "sha256:15f43b2e701821b95c9016cf469d29e2a546cb1c7dead584ba82c36f843995cf",
+                "sha256:9d81515f2b5b27051910996e1e860b1332e354d9e7bcf30c98f21dcb6713e0dd"
+            ],
+            "version": "==3.3.1"
+        }
+    },
+    "develop": {}
+}