change sitemap, remove reading
legacy article "two sum"
change favicon to 16*16
update "ios security"
Merge branch 'master' of https://github.com/zealoct/hanjc.me

Conflicts:
	source/_posts/2014-02-21-6-dot-824-lab3-notes.markdown
update markdown-notes
add recursion-and-dp
[draft] 2 drafts