1. -Add SwitchMusic to fade in/out music.
1. -Add building move logic.
1. -Temp fix effect sound overlap issue.
1. -Add building sound audio and logic.
1. -Improve the sound.
Merge branch 'master' of https://github.com/beyondlwm/FCEngine

Conflicts:
	GameProject/StarRaiders/SourceCode/Scene/IslandScene.cpp
Merge branch 'master' of https://github.com/beyondlwm/FCEngine

Conflicts:
	SourceCode/GUI/Window/Button.cpp
	bin/EngineLaunch.eds