Open most important file on Wizard Completion

In maven and new project wizards

1. Eclipse suggests a readme.html file explaining what has been generated
2. We should open the most important file in the wizard. Maybe HelloAppEngine.java?
3. We should switch to the Java perspective.

The New Resource and Import Wizards commonly create new files, folders, and projects within the workbench. If a single file is created, the wizard should open the file in an editor in the active page. If more than one file is created, open the most important, or central file. This makes it easier to modify and save the file.

Have a readme.html file for every example project, and open that readme.html automatically upon project creation. This will give users an immediate overview of the example: what it does, prerequisites, limitations, steps to take, and so on.