Kerouac: 0.3.2 Maintenance Release

[Fixes] Tag class handling in postclass and bodyclass
[Fixes] Potential XSS vulnerability in admin
[Fixes] Handlebars template files being served on front end
[Fixes] Incorrect mail example in config.example.js
[Fixes] Mail 'from' address is now configurable
[Fixes] Issues with adding images via URL
[Adds] Support for sockets rather than ports
[Adds] SECURITY.md for reporting security issues

Note: Includes updates to Casper