Account for null title

Problem/Motivation

Drupal core doesn't include any default value for node titles, and the column is NOT NULL, this means that if the config get for site name fails, it's sending an invalid node when posting info back to quo.

Proposed resolution

Use 'Drupal' for the site name if none is set, this follows the variable_get() logic in the 6.x/7.x version of the module.

Remaining tasks

User interface changes

API changes

Data model changes