Fixed a bug with saveSettings
Revert "Fixed a bug with saveSettings"

This reverts commit 5a96a3706760f4c2fd6d55e494bdcfa31bf809b7.
Updated saveSettings with default behaviour

When no argument is passed, it will get the inner "settings"
Fixed settings.save

The `save` method now extend the user settings to prevent custom settings
loss.
Merge pull request #200 from YuukanOO/bug-settings

Fixed a bug with saveSettings