[meta] Tutorial for Launcher

[SubhamTyagi]

Desirable feature: may be before stable version release

• On first start:

1. Custom settings selection and default settings selection (i.e. fonts, size, colors,hide apps, restore from old backups etc.)
2. App must navigate to select default launcher selection settings
3. Tutorial for app

[Seaflowery]

May I try to add a simple tutorial for this app?

[SubhamTyagi]

Yes you can.

Remember don't use 3rd party library which are large for this: only single Activity is enough.

[Seaflowery]

I have implemented the feature #181