Fix chronological order bug

Year was not taken into account.
Merge pull request #20 from tomtoump/patch-1

Fix chronological order bug
v0.14.3, bug fixes

- Fix chronological order bug (year was not taken into account)
when rendering homepage.

- Fixed a bug in getTwitterMentions
Merge branch 'master' into static_pages
Refactor _themes default files.

- bucket3/_themes has been removed.
- New folder bucket3/defaults includes skel/ (static files) and
  templates/ (default template files)
"bucket3 init" for the new directory structure
Replaced _/ with assets/ in base.html
Rewrote static pages and assets rendering.