branding: add template variables

we can now have %YEAR% and %VERSION% in the footer

src/provision.js

@@ -11,6 +11,7 @@ var assert = require('assert'),
     async = require('async'),
     backups = require('./backups.js'),
     BoxError = require('./boxerror.js'),
+    branding = require('./branding.js'),
     constants = require('./constants.js'),
     cloudron = require('./cloudron.js'),
     debug = require('debug')('box:provision'),
@@ -233,7 +234,7 @@ function getStatus(callback) {
                 apiServerOrigin: settings.apiServerOrigin(), // used by CaaS tool
                 webServerOrigin: settings.webServerOrigin(), // used by CaaS tool
                 cloudronName: allSettings[settings.CLOUDRON_NAME_KEY],
-                footer: allSettings[settings.FOOTER_KEY] || constants.FOOTER,
+                footer: branding.renderFooter(allSettings[settings.FOOTER_KEY] || constants.FOOTER),
                 adminFqdn: settings.adminDomain() ? settings.adminFqdn() : null,
                 activated: activated,
                 provider: settings.provider() // used by setup wizard of marketplace images