Some Updates to the IHP Forum

Hey, I just pushed an update to the IHP forum.

Here's the most important changes:

• It's now integrated into the main IHP website instead of running at forum.ihpapp.com
• You can now log in with GitHub
• If you log in via GitHub you also have your GitHub profile picture

Since last week the forum also sends email notification when there's a new answer in a thread you've been active in :)