Expose options to middleware

allow middleware to access options like postsPerPage that are
set, but inaccessible functions like handmade routes.
Store tags sorted
Strip leading new line characters to handle automatic previews for some formatters
Merge remote-tracking branch 'byxorna/master'
Increment to v0.2.5, upgrade front-matter dep
Add readMoreTag and readMoreLink to options in readme
Add RSS feed example
Increment version
Correctly sort tags and categories
Use spec reporter on tests
Merge branch 'master' of https://github.com/jsantell/poet

Conflicts:
	lib/poet/references.js