Add getPrinterList method that returns a string vector of installed printers
Improve on updatePrinterInfo method - clear printer state and info before updating
Add getDefaultPrinterName method
Update example - detect and set default printer automatically
Remove test-image.png from git ignore
Remove git ignore from data folder as everyting is defined in the root git ignore file
Add test-image.png
Merge pull request #3 from kr15h/master

Add getDefaultPrinterName Method