minor updates
Update class_outline.md
Create 10082014_Linear_Regressions_CitiBike.md
Rename Data_Visualization_Assignment.md to 09222014_Data_Visualization_Assignment.md
Rename 09222014_Data_Visualization_Assignment.md to 092214_Data_Visualization_Assignment.md
Rename 10082014_Linear_Regressions_CitiBike.md to 100814_Linear_Regressions_CitiBike.md
Rename project_idea_submission.md to 091714_Project_Idea_Submission.md
Merge branch 'forstudentviewing' of github.com:TeachingDataScience/data-science-course into homework