Changes ships for shipnum_t
rst.cc is now -Wno-conversion clean.  Mark private functions as static: ship_report, plan_getrships, star_getrships, Getrship, Free_rlist, listed
Revert accidental addition of -Wno-converison to everything
Undo use of std::min in VN.c
Add new routine initplanetdata, call it from makeuniv
Link in sqlite3
Make commands from rst.cc in the new-style: factories, report, stats, stock, tactical, weapons.  Remove unused macros.
Fix types in ships for number, owner, governor, primary, primtype, seconday, sectype.  Fix ship_size to return unsigned int.  printf formatting fall-out cleanup