Rename README to README.md.
Add placeholder perldocs to bin/statik and Statik.pm.
Fix missing </html>in default html template.
Updates to config/statik.conf.dist.
Cleanup url/url_path setting in Statik::Config.
Make Static::Plugin::Entries die if entries.index is unloadable.
Perldoc tweaks to Statik::Plugin.
Add initial Statik::Plugin::Markdown plugin.
Add post_extension variable to stash.
Add markdown_posts_extension_regex config to Plugin::Markdown.
Rename Parser class to Post, and Posts class to PostFactory.
Add Statik::PostMutator class for making updates to post files.