Create screencast on developing ImageJ plugins in Eclipse

We have a screencast on how to develop and debug ImageJ itself from within Eclipse, but a far more common scenario is to develop ImageJ plugins, without hacking on ImageJ itself. As things stand, people find the screencast on the former and believe it to be applicable to the latter, resulting in various confusion and problems. So let's make a screencast for that simpler, and far more common, scenario!

Migrated-From: http://trac.imagej.net/ticket/2043

Review the existing screencast about developing and debugging ImageJ itself from Eclipse, then focus on the plugin-development scenario described here. Done means a separate screencast clearly shows how to develop ImageJ plugins without modifying ImageJ and prevents the confusion identified in the issue.

Written by the indexing model from the issue text.