Use -O0 optimization for debugging
Use -O0 optimization for debugging

- Silences the Atmel Studio 6 complaining that "The breakpoint will
  not currently be hit. Unable to set requested breakpoint on target."
- However, be aware that some programs may not work properly with -O0
  optimization. In that case try -O1. For example, at least for me, LUFA
  doesn't work with -O0 optimization.

aery32/aery32,aery32/aery32,denravonska/aery32,denravonska/aery32