add homework
Merge branch 'master' of http://github.com/epoch/wdi_sydney_3
warm up
add lab
Merge branch 'master' of http://github.com/epoch/wdi_sydney_3
wrong file
add lab and homework
Merge branch 'master' of http://github.com/epoch/wdi_sydney_3
W2D2 Home work, W2D3 Home work, W2D4 still pending