Copied rockstar.sql as rockstar.txt
added IntroRelDBsMySQLDay2.pdf
Updated quick change
Test the homework file.
updated pdf with Syncing your fork exercise
Merge pull request #1 from maaahd/master

Test the homework file.
Updated day 2 pdf
Added Day 2 and Day 3 ppt
updated presentation slides with git hub fetch and merge
TRIP'S FETCH AND MERGE AND HOMEWORK FILE CHANGES