update gitignore
update bob
add homework
Merge branch 'master' of http://github.com/epoch/wdi_sydney_3
Merge branch 'master' of http://github.com/epoch/wdi_sydney_3
Merge branch 'master' of http://github.com/epoch/wdi_sydney_3
Merge th w1d2 homework
branch 'master' of http://github.com/epoch/wdi_sydney_3