adding fake migration support

[markltbaker]

As per my post in DBDeploy-users (I didn't realise that one could also send a message in github)

I've added the ability to do a 'fake' migration in the CLI with the --fake option. This works in both direct-to-db and generating script modes.

I've also added the --lastChangeToApply parameter to the CLI, which was already implemented, its just wiring up the command line parsing.

I've added / expanded unit tests for this and it all seems to be working locally as well.

So hopefully it's useful!

[markltbaker]

Updated: this is now in use, but I realised I needed to add options to the Ant task as well. 'fake' turns on/off fake migrations and 'quiet' turns on/off the per-statement messages from the direct to db applier, because we had a lot of legacy sql scripts to use that had many statements in.