Map can have an offset.
Created IngameScreenDef.

So we can create several levels.
Ingame screen loads two maps and backgrounds.
Added portal support.
Collision with portals can be detected.
Portal collision handling improved.
Portal switches worlds.
Basic multihero implementation.
Swap hero swaps world if needed.
Multijump now optional.
Added portals.
Created textures for the other hero.
Only fairy can create portals
Added dirt to map tiles.
Disable portals for a half second when created.
Stop physics for a half second when change world.
Male hero can walk through dirt and create portals.
Inactive player becomes static body.
Levels can be finished.
IngameScreen dispose works.