Added recent_posts function

Generate an array of recent posts for the sidebar.
Fixed recent_posts implementation
Fix: h1 tags overlapping after line wrap

Overlap is caused by inadequate line height.
Update to Cascade module, fix for admin

Cascade now supports a few more routes. Updated the deprecated and
misbehaving `preg_replace` calls in Admin.php with
`preg_replace_callback` – the `fix()` calls on descriptions are now
functioning as intended.
Added link relation attributes to prev/next links
Fixed comments ajax refresh, alphabetise tags

JSON response for comment refresh was not working; fixed (now using
same method as Likes). Tags are now listed in alphabetical order in the
Write page and when displayed below posts. Tag alphabetical ordering
now using multibyte safe compare, just for good measure.
Initial commit
Revert "Initial commit"

This reverts commit 2b63c29bae9390214e11f986f729a47c946fc2f5.
Merge pull request #192 from xenocrat/develop

Bunch of fixes and some additions. 

New Feature: Recent Posts (Thank you @xenocrat)