I'm not sure the paged you linked is actually a
-dev release from like 2013.
A page that lists the recent releases can be found here:
I recommend installing the:
drupal 8.0-alpha9, Posted by catch on February 19, 2014 at 2:29am
Keep in mind that Drupal8 prior to I believe any
Beta release is not officially supported by any upgrade path (to my knowledge). If you're a programmer and not a casual site administrator or user; code you write may be affected/break as Drupal8 matures to a release candidate.
Somebody please correct me if I got the
Supported version wrong (even for just developers from an API standpoint; I know like the new Migrate API is still unstable).
After commentary, it turns out ModRewrite needed to be enabled on Apache for these paths to work without a querystring parameter.