sample-wireless-script failed

Problem:
The execution of the tcl script (wireless-leach.tcl--formerly wireless.tcl) to validate LEACH is failing. Somehow, nodes aren't being defined.

Fix:
"sample_leach_script" was originally written as a sh file. Need to convert to bash file.

set alg = leach

changes to:

alg = "leach"

etc, for the variable instanciations.