Etree library example programs

Dave O'Hallaron, Tiankai Tu
Carnegie Mellon University

Files:
Makefile	Builds the example programs
README      This file

etree2txt.c	Dumps octants in an etree to a textfile in z-order
query.c		Queries an etree 
refine.c	Recursively builds the tree.txt etree
tree.e		Example etree created by txt2etree
tree.txt    Text version of tree.e
txt2etree.c	Loads octants in a textfile to an etree

Note: if compiling on Alpha/DUX40D platform, set the appropriate CFLAGS in 
Makefile.

