Changelog for D 2.063 - Work In Progress

Do not pull this yet. This will stay here and be updated until we have a release date for 2.063.

In the meantime work can be done on the changelog to make it ready for the 2.063 release. Note that the list of bugs isn't listed here yet, it will be added when 2.063 gets ready.

Some things I have to work on:

- Put bugzilla issue links for each of these listed changes, and perhaps a link to the pull request that implemented the change.
- Perhaps separate the changelog so each release has its own page. The current `changelog.html` page has gotten quite large (531KB). it would save a lot of bandwidth and make the scrollbar usable if each release had its own separate page.