Adjustable Checking Period (1.10.1)

Some users have been reporting servers are unable to handle updates too fast when player count increases
So I've added options to adjust the checking period of tile entity blocks in the config for admins to adjust the checking period themselves that is suitable for their own server.

I've also added an option to change the GC period (when that plugin clears reference to blocks that no longer need to be kept), but generally, default a period of 600 ticks should be fine.

Note that the period is measured in ticks (20 ticks = about 1 second), and /iv reload does not update the setting.
And that blocks do not update at the same tick.

Here are the options added to the config:
1f808ac#diff-922b6b8db89738c2d936c6bac37533be