fix toctree #588

/Users/grey/github/cloudmesh/classes/docs/source/notes.rst:9: WARNING: toctree contains reference to nonexisting document 'i524/preface/about'
/Users/grey/github/cloudmesh/classes/docs/source/notes.rst:9: WARNING: toctree contains reference to nonexisting document 'i524/preface/disclaimer'
/Users/grey/github/cloudmesh/classes/docs/source/notes.rst:9: WARNING: toctree contains reference to nonexisting document 'i524/preface/convention'
/Users/grey/github/cloudmesh/classes/docs/source/notes.rst:9: WARNING: toctree contains reference to nonexisting document 'i524/preface/instructors'
/Users/grey/github/cloudmesh/classes/docs/source/notes.rst:21: WARNING: toctree contains reference to nonexisting document 'i524/calendar'
/Users/grey/github/cloudmesh/classes/docs/source/notes.rst:21: WARNING: toctree contains reference to nonexisting document 'i524/lectures'
/Users/grey/github/cloudmesh/classes/docs/source/notes.rst:32: WARNING: toctree contains reference to nonexisting document 'i524/project'
/Users/grey/github/cloudmesh/classes/docs/source/notes.rst:50: WARNING: toctree contains reference to nonexisting document 'i524/hids-techs'
/Users/grey/github/cloudmesh/classes/docs/source/notes.rst:50: WARNING: toctree contains reference to nonexisting document 'i524/technologies'
/Users/grey/github/cloudmesh/classes/docs/source/notes.rst:61: WARNING: toctree contains reference to nonexisting document 'lesson/doc/bibtex-1'
/Users/grey/github/cloudmesh/classes/docs/source/notes.rst:61: WARNING: toctree contains reference to nonexisting document 'lesson/doc/bibtex-7'
/Users/grey/github/cloudmesh/classes/docs/source/notes.rst:87: WARNING: toctree contains reference to nonexisting document 'lesson/prg/python_intro'
/Users/grey/github/cloudmesh/classes/docs/source/notes.rst:87: WARNING: toctree contains reference to nonexisting document 'lesson/prg/python_cmd5'
/Users/grey/github/cloudmesh/classes/docs/source/notes.rst:87: WARNING: toctree contains reference to nonexisting document 'i524/python-homework'