this provides a somewhat unconfigurable (at the moment) feed module
which provides Atom and RSS feeds. entries are determined by symlinks to
content pages, because my core CMS usage is still more general and not
blog-like. the symlinks allow for arbitrarily adding entries as I see
fit.
this also moves core Markdown parser stuff to the library module, since
that's used by the feed as well as normal pages
Signed-off-by: Brian S. Stephan <bss@incorporeal.org>
for some reason bandit wasn't earlier catching the SubElement usage but
now it is, but it's harmless anyway so we'll just suppress it.
Signed-off-by: Brian S. Stephan <bss@incorporeal.org>
