- .getEnv(s) => .getSetting(s)
- env spec...
- .default(Setting) => .default.(setting)
- new provider spec
- .include => .includeComponents
- update xmlns:email
    from:  http://xmlns.cadit.com/caditapp/email/1.0
    to:    http://pythonhosted.org/genemail/xmlns/1.0
