add /accounts/ (get, post) routes

Slight markup changes, same style overall and same
form parameters as the PHP implementation.

In addition, we've disabled the "left" and "right"
navigation buttons when we're at the border of the
table.

CSS Changes:

- Added similar styling to submit `<buttons>` that submit `<input>` had.
- Added .results tr td[align="{left,right}"] styling to align
  the result table's `More -->` button to the right of the table.

Signed-off-by: Kevin Morris <kevr@0cost.org>

aurweb/models/user.py

@@ -168,6 +168,15 @@ class User(Base):
             aurweb.models.account_type.TRUSTED_USER_AND_DEV_ID
         }
 
+    def can_edit_user(self, user):
+        """ Can this account record edit the target user? It must either
+        be the target user or a user with enough permissions to do so.
+
+        :param user: Target user
+        :return: Boolean indicating whether this instance can edit `user`
+        """
+        return self == user or self.is_trusted_user() or self.is_developer()
+
     def __repr__(self):
         return "<User(ID='%s', AccountType='%s', Username='%s')>" % (
             self.ID, str(self.AccountType), self.Username)