Add requirement

requirements.txt

+astroid==1.5.3
+colorama==0.3.9
+coverage==4.4.1
+dj-database-url==0.4.2
+Django==2.2.5
+django-environ==0.4.4
+gunicorn==19.7.1
+isort==4.2.15
+lazy-object-proxy==1.3.1
+mccabe==0.6.1
+psycopg2==2.7.3.1
+pylint==1.7.2
+pytz==2017.2
+requests==2.18.4
+selenium==3.5.0
+six==1.10.0
+whitenoise==3.3.0
+wrapt==1.10.11
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