Kerouac: 0.3.1 Maintenance Release

[Fixes] 500 Error in the Ghost importer
[Fixes] Critical issue with markdown being treated as HTML
[Fixes] MySQL issues with deleting posts and tags
[Fixes] Auto-linking inside of code blocks
[Fixes] Pagination partial in theme not overriding the default
[Fixes] Sendmail auto-detection
[Fixes] Date keyboard shortcut crashing the browser
[Fixes] URL-based image uploads saving in the wrong place
[Fixes] Admin redirect resulting in double slash
[Fixes] Broken help & support link
[Fixes] Overly detailed meta generator tag, now only 2 decimals
[Adds] Validation of config.js
[Adds] Full content in RSS feeds
[Adds] Support for embedded gists in Casper

Note: Includes updates to Casper