Add a vmethod that links RT(#:-)(\d+) to RT issues

This vmethod can be extended with other options like GH# if one wants to
Add section anchors to the release page

See #899 for original ticket

It adds #whatsnew #docs #other #examples #modules #provides
Merge pull request #900 from omega/omega/link-issues-vmethod

Add a vmethod that links RT(#:-)(\d+) to RT issues
Merge pull request #901 from omega/omega/section-anchors

Add section anchors to the release page