added lab_04 with data
remove output for push
created some stubs for exercise and renamed data file
a few last minute tweeks
Merge pull request #13 from ga-students/lab_dev

lab 4
Merge branch 'master' of https://github.com/ga-students/DAT_SF_11

adding upstream master
progress made on homework 1

finished pres election lab
commiting deletion of extra pres election labs