remove classes that are referenced elsewhere

Signed-off-by: Alfredo Deza <alfredo@deza.pe>
add a working tox.ini file with a docs env

Signed-off-by: Alfredo Deza <alfredo@deza.pe>
create a contents file so file can be in a toctree

Signed-off-by: Alfredo Deza <alfredo@deza.pe>
add .tox to gitignore

Signed-off-by: Alfredo Deza <alfredo@deza.pe>
tell Sphinx that the contents are now in contents.rst

Signed-off-by: Alfredo Deza <alfredo@deza.pe>
Merge pull request #179 from ceph/wip-tox

creates a `tox.ini` file so that testing/CI is easier