erased swap files from repo, apparently
treeadc5d006d765e5ca1688a3884666189a3c813c5b
-rw-r--r-- 0 __init__.py
drwxr-xr-x - week2
drwxr-xr-x - week3
drwxr-xr-x - week4
drwxr-xr-x - week5
drwxr-xr-x - week5_soln
drwxr-xr-x - week6
drwxr-xr-x - week7