Rename Extension to 'Project Manager for Java'

[brunoborges]

This extension does more than Dependency Viewing, and therefore its name should probably change.

Here are some suggestions:

1. Java Project
2. Java Project Support
3. Java Dependency Manager

(I personally prefer #2).

[jdneo]

//cc @akaroml

[jdneo]

We are planning to rename the extension to Project Manager for Java