Redo the landing page to:

- Show the user's top repos if they have any
  - Show a link to the guide and the repos list if they do not

- Add a getting starting guide
- Redo the repos list to show the user's repos and the top 10 public repos separately

data/model.py

@@ -96,9 +96,11 @@ def get_token(code):
   return AccessToken.get(AccessToken.code == code)
 
 
-def get_visible_repositories(username=None):
+def get_visible_repositories(username=None, include_public=True, limit=None, sort=False):
   query = Repository.select().distinct().join(Visibility)
-  or_clauses = [(Visibility.name == 'public')]
+  or_clauses = []
+  if include_public:
+    or_clauses.append((Visibility.name == 'public'));
 
   if username:
     with_perms = query.switch(Repository).join(RepositoryPermission,
@@ -106,8 +108,15 @@ def get_visible_repositories(username=None):
     query = with_perms.join(User)
     or_clauses.append(User.username == username)
 
-  return query.where(reduce(operator.or_, or_clauses))
+  if sort:
+    with_images = query.switch(Repository).join(Image, JOIN_LEFT_OUTER)
+    query = with_images.order_by(Image.created.desc())
 
+  query = query.where(reduce(operator.or_, or_clauses))
+  if limit:
+    query = query.limit(limit)
+
+  return query
 
 def get_matching_repositories(repo_term, username=None):
   namespace_term = repo_term