This allows admin to edit these pages from the web, using Markdown. It
also dynamically loads information on those pages now, and makes loading
`pages` templates a little easier to find in the code / more explicit.
It requires this new schema change:
CREATE TABLE IF NOT EXISTS `appcontent` (
`id` varchar(36) NOT NULL,
`content` mediumtext CHARACTER SET utf8 COLLATE utf8_bin NOT NULL,
`updated` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
This closes T533
