add CC-BY license

themes\twitter\layouts\default.html
Add 404 pages

Still havn't change /images/trystack.ico files, and the window.location
is http://yujiedu.ruhoh.com/ now, which should be change if I use my own
domain name.The google-analytics.com also should be changed.
Add Afterword

Shake has suggested I should pay close attention to MAAS, as from 12.10
it will not use cobbler. And it will be better to have a local repo for
installtion.
my-first-blog

And some info about how to use github for pages
CNAME

for test.