Creating database :
sudo su
sudo postgres  (above 8.3 only)
createdb -W -O crawler -U crawler crawlerdb  (password "crawler" --> can also be to your choice.then don't forget to change in mediawords.yml)
psql -f (loaction_of_project_dir/mediawords.sql) -U crawler -d crawlerdb


seeds.txt  contains new line seperated urls list