create a test that simulates the whole worldlogic for performance measurements
deactivate_autotimer
Merge branch 'deactivate_autotimer' of https://github.com/voxelinc/voxellancer into reproducable_performance_test
Rename VoxelExplosionParticle to VoxelEffectParticle
Add Engine spawning an EngineTrail based on Acceleration
some visual tweaking
Extract EnginedWorldObject
Add missing files
Merge branch 'master' of https://github.com/voxelinc/voxellancer into reproducable_performance_test

Conflicts:
	src/world/handler/splitdetector.cpp
	src/world/handler/splitter.cpp
	src/world/worldlogic.cpp
improve voxelneighbourhelper
temporarily deactivate particles for testing - revert before merge!
unified test names
boooom, better performance by multiplying with 31 :D
(hashmaps don't like direct neighbours)
Extract enginetrailgenerator, remove enginedworldobject
Add VoxelExplosionGenerator2 (rename pending)
time-based filling of traveled distance
switch to distance-based filling
Switch trails and rockets to generator2
add splitdetector performance tests
test