added lab14 materials
lec 14
added data munging
Merge branch 'master' of https://github.com/ga-students/DAT_SF_10
lec 15
added materials for lab15
Merge branch 'master' of https://github.com/ga-students/DAT_SF_10
adding hw6 solution
Merge branch 'master' of https://github.com/ga-students/DAT_SF_10
HW 7 and updated syllabus
Merge branch 'master' of https://github.com/ga-students/DAT_SF_10
Adding HW7 files.