Added phone-words example
Add compatibility for Turbo C 2.0 and QuickC 2.0

This is interesting since these compilers are from right around the same
year when the ANSI C standard was adopted.

src/llmedian.c:
    * Added a couple of casts to pacify QuickC.

src/phone.c:
    * Added a cast to pacify QuickC.
Add calc example