Sunrise needs to be active

If you're coming from a fresh install, you're not likely to have `define('SUNRISE', true);` in your config. Folks ought to be prompted to do so.
Merge pull request #16 from zamoose/patch-1

Sunrise needs to be active
Check explicitly for update errors

If we don't actually update a row, we've probably had a race condition with
updating. The cache should be updated accordingly.
Check correct variable when loading network mappings
Ensure network mapping is loaded early
Ensure we sort using correct callback
Fix warning if EZSQL_ERROR is missing