Fixed a backtrace crash for AnchorVerb on data model closing.

The correct Robux balance is shown in the success dialog after purchasing plugins.

Fixed a bug with Bones that lead to inaccurate TransformedWorldCFrame values.

Added instrumentation so that required assets can be surfaced on the Developer Console in Studio and Game Server.
Renamed Model to required_asset_# where # is the asset id for required assets so that errors from required assets can be attributed properly in call stacks.

New Squash property to particles for non-uniform particle stretching, curve controlled for bouncy effects.

Improve PluginManagement loading speed.

Improved the performance of programs which make heavy use of nested unions.

Made negative pathfinding area costs illegal. Improved handling non-negative pathfinding area costs.