Haiku R1 beta 1 released

It's been just about a month less than six years since Haiku's last release in November 2012 - too long. As a result of such a long gap between releases, there are a lot more changes in this release than in previous ones, and so this document is weightier than it has been in the past. The notes are mostly organized in order of importance and relevance, not chronologically, and due to the sheer number of changes, thousands of smaller improvements simply aren't recognized here.Please keep in mind that this is beta-quality software, which means it is feature complete but still contains known and unknown bugs. While we are mostly confident in its stability, we cannot provide assurances against data loss.

This is a massive release, especially if you haven't been keeping up with any of the nightly releases over the years. There's so much new stuff and improvements in here that it makes no sense trying to summarise them, so I highly suggest reading the release notes carefully, downloading the beta, and giving it a go yourself in either a virtual environment or on actual metal.