Changeset [670b6675ab34e0c5531de1fa8939dd572b9f3c03] by dleffler

Added some error checking and fixes prior to migration of old database.

Now gives immediate feedback on unusable connection parameters. Runs 4 checks & fixes on old database prior to migration that aids migration (esp for module aggregation). Also makes the migration process more of a wizard since you move to the next step after setting old database parameters.
[#167 state:resolved] https://github.com/exponentcms/exponent-cms/commit/670b6675ab34e0c5...