Add django-constance

Pipfile

@@ -29,6 +29,7 @@ jsonfield = "*"
 openpyxl = "*"
 python-dateutil = "*"
 pytz = "*"
+django-constance = "*"
 
 [dev-packages]
 factory_boy = "*"

Pipfile.lock

 {
     "_meta": {
         "hash": {
-            "sha256": "2ccfcd01725e28d2ef9837139f16a4a3e5485444ca13e850ccacc38a110ef408"
+            "sha256": "210a8806fc2d84e47c10db03977ac6d63925ced3f30b7bcdbe10d5f8d710015c"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -53,6 +53,14 @@
             "index": "pypi",
             "version": "==1.13.0"
         },
+        "django-constance": {
+            "hashes": [
+                "sha256:5a4fec5361214b4658c64184b45a6678cb8f8bf8d342f56976f87d5c6645860a",
+                "sha256:a49735063b2c30015d2e52a90609ea9798da722ed070f091de51714758a5d018"
+            ],
+            "index": "pypi",
+            "version": "==2.3.1"
+        },
         "django-filter": {
             "hashes": [
                 "sha256:ea204242ea83790e1512c9d0d8255002a652a6f4986e93cee664f28955ba0c22",
@@ -240,6 +248,7 @@
                 "sha256:0312ad34fcad8fac3704d441f7b317e50af620823353ec657a53e981f92920c0",
                 "sha256:ec9ae8adaae229e4f8446952d204a3e4b5fdd2d099f9be3aaf556120135fb3ee"
             ],
+            "markers": "python_version >= '2.7' and python_version != '3.0.*' and python_version != '3.1.*' and python_version != '3.2.*' and python_version != '3.3.*'",
             "version": "==1.2.1"
         },
         "attrs": {
@@ -289,6 +298,7 @@
                 "sha256:e05cb4d9aad6233d67e0541caa7e511fa4047ed7750ec2510d466e806e0255d6",
                 "sha256:f3f501f345f24383c0000395b26b726e46758b71393267aeae0bd36f8b3ade80"
             ],
+            "markers": "python_version != '3.2.*' and python_version != '3.0.*' and python_version != '3.1.*' and python_version < '4' and python_version >= '2.6'",
             "version": "==4.5.1"
         },
         "django": {
@@ -342,6 +352,7 @@
                 "sha256:9ec02aa7d674acb8618afb127e27fde7fc68994c0437ad759fa094a574adb265",
                 "sha256:ec0a6cb848cc212002b9828c3e34c675e0c9ff6741dc445cab6fdd4e1085d1f1"
             ],
+            "markers": "python_version < '3' and python_version >= '2.6'",
             "version": "==3.2.0"
         },
         "ipaddress": {
@@ -404,6 +415,7 @@
                 "sha256:6e3836e39f4d36ae72840833db137f7b7d35105079aee6ec4a62d9f80d594dd1",
                 "sha256:95eb8364a4708392bae89035f45341871286a333f749c3141c20573d2b3876e1"
             ],
+            "markers": "python_version >= '2.7' and python_version != '3.0.*' and python_version != '3.1.*' and python_version != '3.2.*' and python_version != '3.3.*'",
             "version": "==0.7.1"
         },
         "py": {
@@ -434,6 +446,7 @@
                 "sha256:9a7662ec724d0120012f6e29d6248ae3727d821bba522a0e6b356eff19126a49",
                 "sha256:f661252913bc1dbe7fcfcbf0af0db3f42ab65aabd1a6ca68fe5d466bace94dae"
             ],
+            "markers": "python_version >= '2.7' and python_version != '3.0.*' and python_version != '3.1.*' and python_version != '3.2.*' and python_version != '3.3.*'",
             "version": "==2.0.0"
         },
         "pylava": {