Release 2010-05-19

Fire Code 17, Subsection J

After reboots:
 * Fix erroneously lit lanterns on certain ships
 * Fix a booched message in expeditions
 * Fix a missing translation for Pirate Hall construction sites
 * Fix some bugs causing missing background images in the installer
 * On medium islands, allow six buildings as long as one of those is housing
 * Fix a bug with jobbers not being able to chart courses to sea monsters