Fix travis config to include cnx-archive's new dependency, cnx-epub.
Merge pull request #50 from Connexions/fix-travis

Fix travis config to include cnx-archive's new dependency, cnx-epub.
Upgrade to compat triggers, document_controls and document_acl.
Downgrade for compat triggers, document_controls and document_acl.
Upgrade and downgrade for modules uuid column.