#59 Move to GitHub

[Elizabeth F]

SourceForge should be considered a bug:

1. Everything else is on GitHub. Logging onto SF, remembering my userID and password, remembering how to use the site just slows things down.
2. SF doesn't do tarballs as well as GitHub, it's harder to set up Spack builds.
3. Instead of using Markdown, SF has this horrible WYSIWYG editor for submitting comments, etc.

[Elizabeth F]

I forgot another thing... SF's password reset just doesn't work (anymore). If you forget your password, kiss your account goodbye...