mark 1.7 as stable, switch to symlinks for beta and nightly, add beta

config.js

@@ -32,12 +32,15 @@ var config = {
   // relative image paths and branch
   directories: {
     //'../gluon/stable/factory/': 'stable',
-    '../gluon/archive/1.6/images/sysupgrade/': 'stable',
-    '../gluon/archive/1.6/images/factory/': 'stable',
-    '../gluon/archive/1.6/images/other/': 'stable',
-    '../gluon/archive/1.7/images/sysupgrade/': 'nightly',
-    '../gluon/archive/1.7/images/factory/': 'nightly',
-    '../gluon/archive/1.7/images/other/': 'nightly'
+    '../gluon/archive/1.7/images/sysupgrade/': 'stable',
+    '../gluon/archive/1.7/images/factory/': 'stable',
+    '../gluon/archive/1.7/images/other/': 'stable',
+    '../gluon/beta/images/sysupgrade/': 'beta',
+    '../gluon/beta/images/factory/': 'beta',
+    '../gluon/beta/images/other/': 'beta',
+    '../gluon/nightly/images/sysupgrade/': 'nightly',
+    '../gluon/nightly/images/factory/': 'nightly',
+    '../gluon/nightly/images/other/': 'nightly'
   },
   // page title
   title: 'Firmware',
@@ -48,7 +51,7 @@ var config = {
   // recommended branch will be marked during selection
   recommended_branch: 'nightly',
   // experimental branches (show a warning for these branches)
-  experimental_branches: ['nightly'],
+  experimental_branches: ['beta', 'nightly'],
   // path to preview pictures directory
   preview_pictures: 'pictures/',
   // link to changelog