* Schedule all neighbour block updates to execute at the end of the tick, fixed recursion crash, close#251
* doTickPending timings now include neighbour block update times, refactored some var names
This also causes some annoying issues with instabreak (false positives). Shoghi dude, this did _not_ fix those issues, only hid them and replaced them with different ones.
* Fixed an age-old light calculation bug causing solid blocks to filter their own light, fixed#375, probably fixed#288
Light spread reduction should be done based on the _target's_ light filter level, not the source.
* Revert "Fix Glowing Obsidian lighting"
This hack is no longer necessary.
This reverts commit 35c33ba980.
* Fixed wrong light levels for torch and redstone torch
* Take adjacent light levels and opacity changes into account, block light will now spread when an obstruction is removed, close#455
* Added timings for Level->setBlock() and lighting updates
- All entity and tile constructors now require a \pocketmine\level\Level instead of a \pocketmine\level\format\Chunk.
- Chunk->getProvider() and Chunk->setProvider() have been removed.
- Chunk::__construct() has had the $provider parameter removed.
- Chunk->unload() has had the unused $save parameter removed.
- ChunkEvents now take a Level parameter instead of going through the Chunk
API bump to 3.0.0-ALPHA4
* Added options to disable movement checks and anti-instabreak and API methods to control this
* Fixed anti-flight false positives
* Fix flight toggle kick cannot be disabled
* Added PlayerIllegalMoveEvent
Refactored level\format\generic\GenericChunk -> level\format\Chunk.
Re-added support for async chunk sending
Refactored most Level IO into new namespaces for more organisation
Removed LevelDB loader completely (will be re-added at a later date)
