Further improvements based on Steven's fixes.
Use long primitives for time calculation.
Workaround for Long objects not having a null value.
Merge remote-tracking branch 'remotes/origin/dev'
Merge branch 'master' into dev

Conflicts:
	src/main/java/com/rushteamc/rtmcdragonrespawn/RTMCDragonRespawn.java
Merge branch 'master' into dev