enable wildcard of rm_rf
Merge pull request #1658 from kamatari/fix-rake-clean

enable wildcard of rm_rf
Merge remote-tracking branch 'octopress/master' into source
Update posts.
Opened a new post on the "criticism thinking" of Dr. Mihalis's paper on
homomorphic encryption. Added a reserved post about scheme performance
from Scheme Wiki.
TODO: Finish the post on Homomorphic Encryption of your ideas and feedbacks.