Improvements in CycleCanceling.

Main changes:
- Use function parameter instead of #define commands to select negative
cycle detection method.
- Change the name of private members to start with "_".
- Change the name of function parameters not to start with "_".
- Remove unnecessary documentation for private members.
- Doc improvements.

#!/bin/bash

for((i=1;i<50;i++))

do

    echo -n $i ''

    edge_lookup 100 $i

done