Adding hw03
Adding test1.c
Merge branch 'master' of https://github.com/AllenDowney/SoftwareSystems
Adding lecture11
Adding hw04
Adding hash.c
Adding lecture12
Adding check_uniform
Merge branch 'master' of https://github.com/AllenDowney/SoftwareSystems
Adding lecture13
Adding solution
Adding Sync.py
Quick fix
Adding lecture 14
Log2 scale
Bug fix in Sync.py
Merge branch 'master' of https://github.com/AllenDowney/SoftwareSystems
Adding lecture15
Merge branch 'master' of https://github.com/AllenDowney/SoftwareSystems
Adding hw04 soln