Version 0.9.0.1

A small bug fix update for the previous version. Big thanks to Kigyo on our discord for pointing out these bugs and helping in the debugging process.

The engine from 0.9.0 didn't deal well with tile layers with off-screen objects larger than a single tile, causing them to pop into frame rather than gradually appear. This has now been fixed. A test room has also been added to test the efficiency of the engine.

Turns out that I've had a bug in the system since like version 0.3.0, and I just never discovered it: the 'move_from' property on a character sprite completely overrode the 'move_from' rules of the underlying tile, essentially making those useless. All 'move_from' properties have been removed from character sprites, and all guides have been updated to reflect that these should not be present. A new test room has been added to test the functionality of direction-specific movement rules. 

Finally, a small feature, as requested by Kigyo. You can now disable the movement rules on a sprite collection using the 'can_always_move'  property on sprite collections. Useful to make your characters make normally impossible moves as part of cutscenes. I will describe this further in the NPC guide that I swear is gonna come out this week (for real this time).