v0.7.2

Depth testing support and performance optimizations.

Added

• Added support for depth testing when rendering outlines. When enabled, outlines are only rendered around the visible object parts (#1).
• Added a few convenience methods to OutlineEffect.
• Added editor tooltips for outline component fileds.

Fixed

• Get rid of GC allocatinos during command buffer updates.
• Fixed compiler warning in post-processing compatibility package (0649).
• Fixed IndexOutOfRangeException when setting outline width to max value (#4).

Removed

• Removed change tracking support in package entities (#2).