I have added a shell script that automates database resets.

EVERYONE NEEDS TO EDIT THE FOLLOWING FILE ON THEIR MACHINE: pg_hba.conf

# IPv4 local connections:
# TYPE  DATABASE    USER        CIDR-ADDRESS          METHOD
host        all                   all             127.0.0.1/32                trust

Is what it should look like. The only thing you should end up changing is the METHOD to trust. After this change is made, then restart postgres and you can do that with "/etc/init.d/postgresql restart" command.