Regroup files in hw-conf and completely rewrite Makefiles.

C file with interrupts was moved in to new directory src where shoul be files related to aplication not to anything else.

Makefiles was reworked because it is more manageable and faster to split project into three main parts.
  1) hw-config - files where we can tell which hardware is used, how many memory we have, were are connected peripheries.
  2) stm32 library - peripheral library compiled into one static library (libxxxx.a). Makefile inside this folder will compile peripheral library with hardware configuration from hw-conf.
  3) src - Application sources.