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Fix compile warning

Update README.md (#4)

Two commits : one to remove a warning (-Wreorder) and one to stop comparing bool with their values, and use them directly instead (#6)

Merge pull request #7 from elektronikworkshop/master

Added debounce time as parameter with default value to constructor. This enables users to set custom debounce times in cases this becomes necessary (like it did on my platform :) )