Change styles for enumerated list following transformation changes

- ol no longer has class="list" and li no longer has class="item"
- data-number-style should be used instead of decimal (bug)
Merge pull request #643 from Connexions/fix-enumerated-list

Change styles for enumerated list following transformation changes
Fix legacy regex
Merge pull request #644 from Connexions/fix-legacy-regex

Fix legacy regex
Merge branch 'master' into staging