Fix module capitalisation and pagination bug

[karutsuki]

This pull request fixes two issues:

1. Module capitalisation: Module names were not working properly because capitalisation was not consistent (I suspect this was developed on Windows where the filesystem is not case sensitive, but it breaks in Linux).
2. Pagination bug: api.py line 1337 was calling self.experiment(id,page) (mind the page argument), but self.experiment only accepts a single argument (id). The method self._experiment is the one that admits the arguments id and page, so I change the code to use that one.

I have tested these changes locally and verified that they solve the issues.