Make draw script executable from anywhere, not just /bin dir

Before

	[rhusar@x220 jgroups]$ ./bin/draw.sh 
	./bin/draw.sh: line 5: jgroups.sh: command not found

After

	[rhusar@x220 jgroups]$ ./bin/draw.sh

	-------------------------------------------------------------------
	GMS: address=x220-43294, cluster=draw, physical address=127.0.0.1:55388
	-------------------------------------------------------------------
	..etc