clean up
clean up
clean up
smallchanges
trying to merge
added Practice problems
added intro to python link
add python exercises
Merge pull request #3 from sampathweb/master

Added Python Exercises for Lab 1
Merge branch 'master' of https://github.com/ga-students/DAT_SF_11
Lecture 1
my answers
Merge branch 'master' of https://github.com/ga-students/DAT_SF_11
practice