Adding returned sqlpatch value to error output.
Force DbUpdate to use 'setting' => 'sqlpatch' so old installs can update.
Make getSetting for site prefer 'setting' as column name.

Conflicts:
	nzedb/db/Settings.php
Forgot to change the empty check ;-)

Conflicts:
	nzedb/db/Settings.php
Refactoring DbUpdate to instantiate a separate Settings only if the instance in $this->db is not a Settings instance.
Merge branch 'dev' of github.com:nZEDb/nZEDb into dev
Updating Changelog.