Rename min mean cycle classes and their members (#179)
with respect to the possible introduction of min ratio
cycle algorithms in the future.

The renamed classes:
- Karp --> KarpMmc
- HartmannOrlin --> HartmannOrlinMmc
- Howard --> HowardMmc

The renamed members:
- cycleLength() --> cycleCost()
- cycleArcNum() --> cycleSize()
- findMinMean() --> findCycleMean()
- Value --> Cost
- LargeValue --> LargeCost
- SetLargeValue --> SetLargeCost

 #!/bin/sh

 # Run in valgrind, with leak checking enabled

 valgrind -q --leak-check=full "$@" 2> .valgrind-log

 # Save the test result

 result="$?"

 # Valgrind should generate no error messages

 log_contents="`cat .valgrind-log`"

 if [ "$log_contents" != "" ]; then

         cat .valgrind-log >&2

         result=1

 fi

 rm -f .valgrind-log

 exit $result