Merge pull request #8 from andreasrosdal/master

Sync cazfi with my latest development on freeciv-web.
Use freeciv r22904.
When iterating over base type indexes, do exactly that, and don't expect
base_type_iterate() to go in correct order. This also fixes compiler
warning about unused pbase parameter from base_type_iterate().
Merge pull request #20 from cazfi/master

Sync