Update website to reference GitHub for code, issues

[ajohnson1]

https://www.eclipse.org/equinox/resources.php

has some out of date references to Bugzilla:

Bugs/Issues
Note that a large amount of the activity goes on in Bugzilla.

The old bugs might still be there, but new bugs should be raised on GitHub https://github.com/eclipse-equinox#reporting-issues

Git

references git.eclipse.org

Website
The Equinox website itself is hosted in a CVS repository and mirrored on a conventional HTTP server every minute or so

https://www.eclipse.org/equinox/planning/
Broken link
http://www.eclipse.org/projects/project-plan.php?projectid=rt.equinox
Should this be
https://projects.eclipse.org/projects/rt
or
https://projects.eclipse.org/projects/eclipse.equinox

This https://www.eclipse.org/equinox/p2/ also references git.eclipse.org not github.com

I'm sure there are other updates to be made with the move to GitHub.

Also, the project pages could be updated:
https://projects.eclipse.org/projects/rt/developer

Thanks

This appears now to be on GitHub