Increase Decimal precision for coords in db

Increase Decimal precision for coordinates stored in the database.

Signed-off-by: Emanuele <feliziani.emanuele@gmail.com>
Secure @user.update

The `@user.update` command was failing mainly because of coordinates formatting. Now I added a bang (`!`) to the `.update`, so that the data get stored nonetheless. I also added an `if` to check that the data get stored correctly, otherwise the Ajax response will be an `error` message.

Signed-off-by: Emanuele <feliziani.emanuele@gmail.com>
Add Ajax addFriend functionality

Add the Ajax addFriend functionality.

Signed-off-by: Emanuele <feliziani.emanuele@gmail.com>