Started refactoring of Teleport(er) class.
Reworked tile add/remove creature logic.
TBD: stairs & special teleporters
Fixed crash in Player::sendIcons()
- Improved teleporter logic.
- Added stairs & holes logic.
- Updated various documentation files.
Updated tasks.
Updated README.
Added new move event willAddCreature which can abort creature movement before it happens.
Fixed two warnings.
Fixed stairs.
Fixed that player blocking/absorb/reflect does not work.
Updated tasks.