tidy configuration files

conf/etc/config.ini

 [settings]
+# stored as /etc/opt/purist_account/config.ini
 # note that % must be escaped as %%
 DEBUG=True
 ALLOWED_HOSTS=localhost
-STATIC_ROOT=/var/opt/prototype_account/static
+STATIC_ROOT=/var/opt/purist_account/static
 REGISTRATION_OPEN=True
 REG_PERSON_BASE_DN=ou=people,dc=example,dc=com
 REG_PERSON_OBJECT_CLASSES=inetOrgPerson,organizationalPerson,person
@@ -12,3 +13,4 @@ AUTH_LDAP_SERVER_URI=ldap://ldap.example.com
 AUTH_LDAP_START_TLS=True
 AUTH_LDAP_BIND_DN=cn=admin,dc=example,dc=com
 AUTH_LDAP_USER_SEARCH_BASE_DN=ou=people,dc=example,dc=com
+SQLITE_DB_PATH=/var/opt/purist_account/db.sqlite3

conf/etc/secret.ini

 [settings]
+# stored as /etc/opt/purist_account/secret.ini
 # note that % must be escaped as %%
 DJANGO_SECRET_KEY=random_key
 AUTH_LDAP_BIND_PASSWORD=ldap_password