Use a base 10 log
zip file for coursera
Prog Assgn 2 is a peer assessment
Merge branch 'master' of github.com:rdpeng/courses

* 'master' of github.com:rdpeng/courses:
  zip file for coursera
  Use a base 10 log
Merge pull request #14 from rdpeng/master

Miscellaneous updates
new stuff
allnew