fix FTC example
fix cost
add failure generator
reuse workflowsim examples
fix no failure error
fix some errors
add distribution
add overhead generator
change failure generator
ready for parameter sweep
change ftc
fix failure generator error with dynamical size adjust
add fault tolerant clustering methods
remove DistributedClusterStorage;change the bw in Vm.getBw()
fix WorkflowBasicExample1
minor change
add wiki
add roundrobin planning algorithm
add pso planning algorithm
fix PSO planning algorithm and add MyParticle and MyFitnessFunction
classes