shell/shell.c: Added INIT state

Signed-off-by:  <ppjm@correo.ugr.es>
fine-delay/timer.c: For timer management

Signed-off-by: JJimenez <ppjm@correo.ugr.es>
Pulse command working

Signed-off-by: JJimenez <ppjm@correo.ugr.es>
term command

Signed-off-by: JJimenez <ppjm@correo.ugr.es>
cmd term

Signed-off-by: JJimenez <ppjm@correo.ugr.es>
Various: My work until today

Signed-off-by: Jose Jimenez <ppjm@correo.ugr.es>