How to compile

[Kalashnikovni]

FYI: I've updated Makefile.in sb-graph-dev , so to compile the library you have to use make compile instead of just make if you have these last changes.
@joaquinffernandez @francosansone @LucasCavagna @LucioTrincheri @yamilsaer
PS: I know it's silly, but I wanted everyone to know just in case.