Can't read config files from pgAdminIII on local Kubuntu machine
pg_hba and postgresql.conf should stay under   

/etc/postgresql/[pg_version]/main/


then you should link them to /var/lib.. with:

#:ln -s /etc/postgresql/[pg_version]/main/pg_hba.conf
/var/lib/postgresql/[pg_version]/main/pg_hba.conf