libcurl added to install dependencies

readme.md

@@ -3,7 +3,7 @@
 [![coverage report](https://git-r3lab.uni.lu/piotr.atyjaszyk/scheduling-system/badges/master/coverage.svg)](https://git-r3lab.uni.lu/piotr.atyjaszyk/scheduling-system/commits/master)
 
 ## Required software (on ubuntu's OS family):
-  - `sudo apt-get install libpq-dev python-dev postgresql postgresql-contrib python virtualenv python-virtualenv gcc python-lxml libxml2-dev`
+  - `sudo apt-get install libpq-dev python-dev postgresql postgresql-contrib python virtualenv python-virtualenv gcc python-lxml libxml2-dev libcurl4-openssl-dev`
 
 ## Postgres installation
   - If you don't have postgres installed, complete step seven from [https://www.digitalocean.com/community/tutorials/how-to-install-and-configure-django-with-postgres-nginx-and-gunicorn](https://www.digitalocean.com/community/tutorials/how-to-install-and-configure-django-with-postgres-nginx-and-gunicorn) (remember to save all the credentials, they will be necessary to run the application).