Add DB scheme screenshot
Add DB scheme screenshot

Signed-off-by: Petr Stehlik <34fd672d4ba535a5cc62ffb15c811632a40953f1@stud.fit.vutbr.cz>

petrstehlik/pyngShop,petrstehlik/pyngShop,petrstehlik/pyngShop,petrstehlik/pyngShop