add a background image(black) at back of tutorial text make it more readable
Merge branch 'master' of https://github.com/keinerweiss/AiWanFan

Conflicts:
	Assets/Scripts/AutoSave.cs
	ProjectSettings/EditorBuildSettings.asset
Revert "add a background image(black) at back of tutorial text make it more readable"

This reverts commit 78ed575e56b1557fac3f04124905fc2b6021e08b.
a  little change
Revert "Revert "add a background image(black) at back of tutorial text make it more readable""

This reverts commit aead7ae5f8ac03624699512d531f5dccc76b43f7.

and make tutorial text readable