HCoB quest:

- Added Going Down

map stuff to do:
```
add aid 50091 to {x = 32607, y = 31501, z = 13}
add aid 50092 to magic forcefield @ {x = 32611, y = 31497, z = 14}
add aid 50093 to magic forcefield @ {x = 32611, y = 31497, z = 15}
add aid 50095 to door @ {x = 32608, y = 31516, z = 14}
add aid 50096 to door @ {x = 32606, y = 31489, z = 14}
add aid 50097 to door @ {x = 32584, y = 31499, z = 14}
add aid 50099 to ore wagon @ {x = 32603, y = 31339, z = 11}
add aid 50100 to ore wagon @ {x = 32599, y = 31505, z = 13}
add aid 50101 to ore wagon @ {x = 32577, y = 31508, z = 9}
add aid 50102 to ore wagon @ {x = 32628, y = 31514, z = 9}
add aid 50103 to ore wagon @ {x = 32683, y = 31508, z = 10}
add aid 50104 to ore wagon @ {x = 32700, y = 31449, z = 15}
add aid 50105 to ore wagon @ {x = 32662, y = 31496, z = 13}
add aid 50106 to ore wagon @ {x = 32720, y = 31488, z = 15}
add aid 50107 to ore wagon @ {x = 32688, y = 31472, z = 13}
add aid 50108 to ore wagon @ {x = 32703, y = 31506, z = 12}
```