Replace includes of stm32/YY/xxxx.h with stm32/xxxx.h
Replace stm32/YY/nvic.h with cm3/nvic.h.
In some cases, the include list was resorted alphabetically when it was
complicated and I was reviewing them manually, but most of this was
automatically done.
- Integer printing function fixed.
- because of comparison against smaller than 0 numbers we must use signed numbers!
- Value zero was not printed at all.
- It was printing one more character than it should.
- Erasing unnecesary commentaries.
- Erasing debugging help.
