Changelog for 3.0-505

Merge branch 'zcomploc-support'

zcomploc is a feature of the GC/Wii GPU used to perform some depth operations.
It was previously not implemented in Dolphin. This commit adds support for it.

List of games fixed by this commit:

* 007: Everything or Nothing (Skybox in front of the map/models)
* Baten Kaitos (characters displayed in front of background objects)
* Tony Hawk's Pro Skater 3 (invisible skater)
* Ty the Tasmanian Tiger (floating floor)
* Super Smash Bros Brawl ("Link chasing pig" animation behind the score screen)

Fixes issue 4841.