fix intersectionCheckCountdown intialized to some random memory, made property member for period static
Update voxelparticle.cpp
Merge branch 'master' of https://github.com/voxelinc/voxellancer into fix_particle

Conflicts:
	src/voxeleffect/voxelparticle.cpp
Merge pull request #271 from voxelinc/fix_particle

fix intersectionCheckCountdown intialized to some random memory