Merge pull request #1 from ochoudhu/master

Merge branch 'master' of https://github.com/hmeng-19/dagscheduler
Add sleep.makeflow
Add results for sleep.makeflow

Run sleep.makeflow with machine number 1, 10, 20, 30 ,40 , 50
Add case2.makeflow
Add list_transfer to remove the task length from a complete task_list file
Mover Out_Scheduler_*.txt into the Out_Scheduler directory
Rearrange files for case1 and case2
Add three degrees to represent the user's knowledge of tasks
Merge pull request #2 from ochoudhu/master

Added Log Parser
Add half_process
calculate the max parallel degree of a workflow
Add cache for <task_list, max_parallel_degree>
Add function level_width
Optimize level_width to speed up the execution
Add topological sort for case 4
Add case4_1
Add case3_list
Rearrange case3 and case4 implementations.
Cleanup dag_evaluator
Add README