Adds dual spec support to individual AceDB-3.0 databases and provides AceDBOptions-3.0 hooks to handle it. This allows the user to enable dual spec feature and to select the alternate profile to be enabled on talent switching. This feature is disabled by default and the user has to create the alternate profile himself/herself. Read the quick tutorial to know how to add dual spec support to your addon. There is also an API reference though it should not be very useful in most cases.