broken links on core readme

[benhalverson]

Where should the vanilla Edition link and gulp edition link... link to?
Currently they are 404'ing on github.

[stale]

It's hard to keep track of everything. This issue has been automatically marked as stale because it has not had recent activity, neither from the team nor the community. It will be closed if no further activity occurs. Please consider adding additional info, volunteering to contribute a fix for this issue, or making a further case that this is important to you, the team, and the project as a whole. Thanks!

[bradfrost]

Is the links in question on the README? I think things might have changed with the introduction of the monorepo, but let me know if those links are still around.

[benhalverson]

@bradfrost it looks like @engelfrost made the fixes