Move SaveUtil into util package

Bump version to 1.0.0-RC2

Use correct getChunk call for possibly unloaded chunk

Would've thrown rather than returning null.
This also disables the gradle daemon. I think this
thing causes me more trouble than it solves honestly.

This commit is included in forge's 1.0.0-RC1, do not ask
me to port this.

Move to edge checks for loading and generating light

While it might appear at first glance that the vanilla
chunk system makes a guarantee that 1 radius chunks are
loaded for lighting, this isn't actually the case. In fact,
no chunks could be loaded! And yet, the light function is
actually required to be completed still! The only way
we can do this is with edge checks.

In the 1.17 snapshots, it looks like chunk loading doesn't
load 1 radius chunks - which means our logic to require 1 radius
just has to go. In order to ensure that this new behavior
doesn't cause lighting problems on chunk edges, chunk loading
now does edge checks.

At this point, the entire codebase is 1.17 ready and likely
ready to be published on curseforge.

Bump light version again

Tuinity had some problems, and it bumped the version. So
we must also.

Starlight 0.0.2-RC3

1. Fix chunk relighting
 In order to make relighting more reliable, move the
 emptiness map lookups to their own cache. This allows us
 to not clobber/use emptiness map values for chunks that were
 not relight during the call.
 More importantly, fix a typo where we supplied the wrong chunk
 argument to the emptiness change function for chunk neighbours -
 this caused the nibbles for the target chunk to be clobbered.

2. Fix broken edge checks
 While edge checks are not currently used, it doesn't mean
 they should be broken. Edge checks should be able to happen
 on null nibbles for block lighting (sky lighting will not have
 nibbles marked null during edge checks).

3. Make handleEmptySectionChanges non-relaxed serverside
 For the server, it should be that the chunks in 1 radius are
 loaded during this call.

4. Fix incorrect neighbour nibble init logic
 We need to be copying the whole array, not just
 the first 9 values.

5. Fix potential missed updateVisible calls
 rewriteNibbleCacheForSkylight could set a value
 in the cache to null and not update the nibble.
 Now the call will call updateVisible when
 removing nibbles from the cache.

6. Fix skylight propagation on the -1 chunk section
 Allow sources to be set up on y=-16, and fix light
 retrieval for y < -16

Starlight 0.0.2-RC2

1. Finish mixin cleanup
 No longer screw around with serverside scheduling, should
 improve compatibility with mods that like to do that.

 Add at-reason to at-Overwrites

 Move client mixins to own package

2. Re-schedule block changes to the main thread
 Fixes #6

3. Fix typo for serialized data (versiom -> version)

4. Clean up skylight propagation code
 Delaying the block sets is now a parameter in the general
 propagate method, and move the delay logic to no longer use a flag
 but to rather call a method later.

So far 0.0.2 looks good, will probably go on CF in the coming
weeks.

README.md changes

Fix compile