clean up
added solution to lab 2 - Auto-mpg
Merge pull request #14 from sampathweb/master

added solution to lab 2 - Auto-mpg
lab 3 - Pres Elections Solution
Merge pull request #15 from sampathweb/master

lab 3 - Pres Election Exercise Solution
Homework. Final Submitted on 12/8.
Merge remote-tracking branch 'upstream/master'