COciSchema: read column comments from another schema
Merge pull request #3305 from gureedo/oci_comments

COciSchema: read column comments from another schema
typo fix in guide

fixes #3308
Remove async from list of Special Attributes so that it is possible to use async=false per issue: #3314
Merge pull request #3316 from wilwade/3315-issue-fix-async

Remove async from list of Special Attributes so that it is possible to u...