Added basic collision for snowball and egg

Eggs spawn chickens every single time, someone needs to correct this for
MC mechanics. ThrowItems now has actually move do to missing mass setting.
Fixed killall command to only kill entities that have VanillaComponent and
also print out the proper component that was killed. Someone needs to
correct the proper physics as well for these.
Signed-off-by: Steven Downer <grinch@outlook.com>