M$ Windows friendly

Incorporate --quiet and --ppm suggested by dtiller
Incorporate squawk field on interactive mode as suggested by terribl

Additionally, make things compile and run on Windows using MS Visual C++
6 by changing the following :

Change all long long variables to uint64_t
Change all unsigned char variables to uint8_t
Typecast all malloc returns to the correct pointer type
Typecast all float to int function conversions
Add windstubs.c and winstubs.h to emulate Linux behaviour under windows
Add #ifdefs for other Windows specific stuff