Add a basic merlin project file
Don't try to build the blog if there are no entries
Fix home href bug (files in the root like about.html need '.')
blog: remove space after date
Blog: give each blog entry a directory subtree and don't assume html
.merlin: don't forget apalog
Blog: use URIs for Atom feed generation

Posts get relative URIs, the 'self' link of the feed is accurate, the
feed 'id' is set to the blog root, each entry's 'id' is set to that
entry's URL. Validates.
Merge pull request #105 from dsheets/blog-tweaks

Blog tweaks