Announce beta availability

v2.067.0-b1
v2.066.1-rc1
Fix use of LINK2 when RELATIVE_LINK2 is more appropriate
Fix illegal anchor names
Clean up ddoc style in deprecate.dd
Update status of deprecated features
Merge pull request #652 from 9rnsr/fix_deprecated

Update status of deprecated features
Normalize anchor name format
Merge pull request #618 from JakobOvrum/normalize_anchors

Normalize anchor names