Base structure for a blog

We have a divider and pagination; still missing proper HTML for
pagination controls.
Changed permalinks (i.e. links to posts) paths
Divider only between posts
Dummy posts for test
Defaults for YAML front matter

Note: requires Jekyll 2.0 at least
CSS code cleanup
Adjusted metrics for post titles and dates

Now post title and the corresponding date are shown at the same
position both if the post is inside a list of posts and if the post
is on a standalone page.
Divider added to footer
Reduced grey bar size in main page
Pagination in main template page
Paginate: link to first page without "index.html"
Updated dummy posts
Post index to main page (no more archive dir)
Fixed mangling of "previous page" link to home
Navigation bar as include
Updated YAML pygmentize option to Jekyll 2
Removed stale example file
Anchor to posts section from navigation bar
Header link pointing to home
Merge branch 'feature-blog' into master