Continental supplies: Upside-Down World special now works in cave maps as well
In cave maps, the hog is teleported just below the border. A bit of land is erased, too.
Lua scripts for engine testing. These scripts are the same as other Lua scripts
in Hedgewars, but you ought to call `EndLuaTest(TEST_SUCCESSFUL)` or
`EndLuaTest(TEST_FAILED)` when the test is completed.