Bitmap Bugfix

Bugfixes
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- Fixed the cinema/hall bitmap which was only 910 pixels wide instead of the required 960.
Cinema, tweaked elevator cars, bugfixes

Features
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- Added Cinema item.
- Added "Cannot place item there" message.
- Tweaked Elevator::Car to move a tad faster.

Bugfixes
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- People are now properly removed from elevator cars when they're removed from the elevator item through removePerson().
- Game::addItem() now properly populates the itemByFloor map multiple times if it has height > 1.