Added an example with png rounded modules using gd (#215) #23

Job	Run time
Build and publish API docs	16s
Static Code Analysis (7.4)	37s
Static Code Analysis (8.0)	34s
Build and publish user manual	17s
Static Code Analysis (8.1)	33s
Static Code Analysis (8.2)	29s
Static Code Analysis (8.3)	46s
Unit Tests (ubuntu-latest, 7.4)	4m 56s
Unit Tests (ubuntu-latest, 8.0)	4m 21s
Unit Tests (ubuntu-latest, 8.1)	5m 32s
Unit Tests (ubuntu-latest, 8.2)	4m 36s
Unit Tests (windows-latest, 7.4)	10m 9s
Unit Tests (windows-latest, 8.0)	5m 50s
Unit Tests (windows-latest, 8.1)	6m 36s
Unit Tests (windows-latest, 8.2)	8m 59s
	54m 31s

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