bootstrap: page doctype etc is just a sprintf, not a cow <:html< >>
[headers] add `application/pdf`
[foundation] handle trailers better
[lib] push the foundation specific bits under `Foundation`
[lib] add some dispatch support
[dispatch] make Page into Html, and add Page with attached headers
Merge branch 'master' of github.com:mirage/cowabloga into mor1-master
update version to 0.0.4
restore 4.00.1 compat
Merge pull request #15 from avsm/mor1-master

Updates for Mirage 1.1.0