[refactor] Make module names lowercase

[pazdera]

The modules in the kano_apps package are now in CamelCase which doesn't comply with the PEP8 style guide. It would be nice to convert them to lower_case_with_underscores.

Things to be aware of: we need to make sure to propagate the change to all the packages that might depend on kano_apps -- I'm not sure whether there are any at the moment, but it's worth checking.