add beta release description and registration
Edit for usage

Signed-off-by: Don Marti <dmarti@cloudius-systems.com>
Merge branch 'beta-program-registration' into beta-pages
Increase iframe size to minimize scrolling

Signed-off-by: Don Marti <dmarti@cloudius-systems.com>
Rename alpha page to Recent Updates

Edit to remove old alpha content and summarize recent
work.

Signed-off-by: Don Marti <dmarti@cloudius-systems.com>