Changed the naming conventions (read more)

I've changed some naming concentions in the lua APIs. I've also made a few
other tweaks, like region_pager_api.cpp delegating to the passed
RegionPager object. This won't explicitly run, becuase there's still a few
more changes needed.

common/map/region_api.hpp

@@ -24,7 +24,7 @@
 
 #include "lua/lua.hpp"
 
-#define LUA_REGIONLIBNAME "region"
-LUAMOD_API int luaopen_regionapi(lua_State* L);
+#define TORTUGA_REGION_NAME "Region"
+LUAMOD_API int openRegionAPI(lua_State* L);
 
 #endif