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App connection fix
Duplicate applications fix
Securize activites by checking nemopay session

Better internet management
Restart app if not connected at the start

Import optimization

Manage internet connection
Popup if no internet is available

Set foundation and categories to print
Change main text

Add author text

Optimization
Cleaning

This reverts commit 9f84c96d.

Use GridLayout

Print image

Optimization
Cleaning

Creation of the repository
Creation of the Android Studio project
Creation of the first structure