When exporting connectors, allow option to export as a CAF

To test importing a connector, I exported one from an older Designer. In doing so, the Designer exports a .CDK file and whatever jar files the connector needs. These files are placed in the directory specified at the time of export. If we exported a Connector Archive File (CAF), all the pertinent files would be located in one easy-to-use package.

BTW, when I imported the stuff, it didn't work.