Patch to fix wording in import message

Hi,

When a configuration has been imported from Datastore to Activestore, the module throws out the message "Reverted @configuration.". According to most dictionaries, reverted means "go back to" or "return to the former". However, when importing a configuration from the DataStore this isn't necessarily about "going back to". It might just as well be that I'm importing an updated configuration from a development site to a production site, and in that case we're talking about an updated configuration.

I'm therfore suggesting the message to say "Imported @configuration from Datastore to Activestore.". I've attached a patch which would fix this.

Also, I see that the wording of Datastore and Activestore isn't consistent. Some places it's Data store, and other places it's Datastore. Same goes for Activestore vs. Active store. Would it make sense to tidy this one up too? I know it's a matter of details, but the devil (or God if you prefer) is after all in the details...