Moved everything but CmisClient from model.py to domain.py, moved all Atom Pub specific logic to atompub_binding.py, moved generic util functions to util.py, changed method signature on ACL.addEntry() so that callers do not have to instantiate an ACE object before calling, created a starter browser_binding.py module

git-svn-id: https://svn.apache.org/repos/asf/chemistry/cmislib/branches/binding_refactor@1444466 13f79535-47bb-0310-9956-ffa450edef68