added a falling sphere
Merge remote-tracking branch 'origin/master'

Conflicts:
	Assets/Scenes/scene1.unity
	Assets/Scripts.meta
	ProjectSettings/Physics2DSettings.asset
	ProjectSettings/ProjectSettings.asset
Revert "Merge remote-tracking branch 'origin/master'"

This reverts commit ec3b42d9fe0e12b74e405830d66a8a8bd19a6509.