TIDOC-1066 / TIDOC-960 JSDuck changes to support Cloud docs.

Test against both cloud docs and existing ti docs.

Requires a companion doctools PR, https://github.com/appcelerator/doctools/pull/12

See testing notes in [JIRA](https://jira.appcelerator.org/browse/TIDOC-1066?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel)