v4.1.8-alpha

• Normalize paths to always have a leading slash when comparing against the CSRF blacklist (#775) (possible breaking change for some environments - please see updated docs at https://learn.userfrosting.com/routes-and-controllers/client-input/csrf-guard#blacklisting-routes)
• Set display_errors to true for development configs (#762), move php settings into a common php subkey in config files
• ShutdownHandler no longer responsible for logging fatal errors
• Set up PHP config values in Core.php instead of inside the config service definition.
• Reimplement Builder::exclude to maintain a list of excluded columns, and then automatically update list of columns to fetch in get()
• Deprecate Model::queryBuilder and Model::export
• Update nginx config file from spdy to http2
• Add Pagespeed block (commented out) to nginx config file
• Make fpm-php7.0 the default CGI nginx config file