audio_thread.c
1. added #define INPUTFILE "/tmp/audio.raw"
2. added declaration for FILE *inputFile
3. changed sAttrs.mode = Sound_Mode_OUTPUT; (instead of full duplex)
4. added fopen for input file
5. removed Buffer_create for input buffer
6. replace Sound_read in "prime the pump" (just before while loop) with fread
7. replaced Sound_read in while loop with fread
8. removed input buffer free from cleanup and replaced with fclose
9. removed hBufIn, hBufEnc variable declarations (hBufEnc should have been removed from lab9-->8)

