dooropen	Check to see if the door was opened during execution of program.

sg_gd		Reads a file in root, in a sub-directory, a new directory and shows how to do simple file reading.

sg_gd2		Reads a file into memory (allocates storage dynamically).

sg_gd3		GDFS demonstration of asyncronous file reading. 

sg_gd4		GDFS Streaming example.
