Modified index for running task section

Modified luigi.js

Implemented running tasks, but also implemented done tasks

Removed the done list, so now just has running list

Made it so dependency graph button shows instead of error button (would be nice to have both really for all tasks)
Added pending tasks - note this feature would be better with pagination on tasks
Switch RawConfigParser -> ConfigParser.

Unsure how to unit test, but I did test it locally.
Added an error message when searching for a task that doesn't exist
Made it so that the error button will only show if there was an error
Changed ordering of tasks in the task list to be most recently submitted first (within each grouped list of tasks)
List done tasks in visualizer

List done tasks in visualizer as well as upstream failed and failed.

Show "Dependency graph" button for done tasks

Show "Dependency graph" not "Show error trace" button for done tasks in
task list.
Add tooltips with parameters to dependency graph.

Display only task name on the dependency graph.
Fixing a formatting issue in the readme file