Add codecov code coverage

Closes #110

.coveragerc

@@ -0,0 +1,3 @@
+[run]
+branch = True
+omit = site-packages

.travis.yml

@@ -11,3 +11,6 @@ script:
   - python manage.py migrate
   - python manage.py collectstatic
   - python manage.py test
+  - nosetests --with-coverage
+after_success:
+  - codecov

codecov.yml

@@ -0,0 +1,26 @@
+codecov:
+  notify:
+    require_ci_to_pass: yes
+
+coverage:
+  precision: 2
+  round: down
+  range: "70...100"
+
+  status:
+    project: yes
+    patch: yes
+    changes: no
+
+parsers:
+  gcov:
+    branch_detection:
+      conditional: yes
+      loop: yes
+      method: no
+      macro: no
+
+comment:
+  layout: "reach, diff, flags, files, footer"
+  behavior: default
+  require_changes: no

requirements.txt

@@ -1,6 +1,19 @@
+certifi==2017.7.27.1
+chardet==3.0.4
+codecov==2.0.9
+coverage==4.4.1
 dj-database-url==0.4.2
 Django==1.11.5
 gunicorn==19.7.1
+idna==2.6
+nose==1.3.7
+nose2==0.6.5
 psycopg2==2.7.3.1
+py==1.4.34
 pytz==2017.2
+pytest==3.2.3
+pytest-cov==2.5.1
+requests==2.18.4
+six==1.11.0
+urllib3==1.22
 whitenoise==3.3.1