This is a simple example program that shows how to use the stdin_to_temp
function in stdin_to_temp.h in the igl library.

To Build:
  make

To Run:
  cat file1 | ./stdin_to_temp_demo
  cat file1 | ./stdin_to_temp_demo | cat >file2
  cat file1 | ./stdin_to_temp_demo dummy1 dummy2 | cat >file2
  ./stdin_to_temp_demo <file1 | cat >file2
  ./stdin_to_temp_demo <file1 >file2