generate sitemap using `html_pages`

using `pages` will include all files irrespective of their extension
Merge pull request #10 from spagalloco/exclude-feeds

generate sitemap using `html_pages`
:gem: bump
add script/release
Bump jekyll dep to 2.0
Set log level properly; KIll .ruby-version
Can't use date_to_xmlschema on a string, silly.
Merge pull request #12 from jekyll/release-0-4-0

Bump jekyll dep to 2.0
Remove "baby"
Merge pull request #13 from itafroma/master

Remove "baby"
failing test for excluding static html files