Add LCCC dataset
_The documentation is not available anymore as the PR was closed or merged._ Thank you very much for your help @albertvillanova .

I think I have fixed all the comments.

Please let me know if this PR need further modification ;) @albertvillanova Thank you very much for your kind help.
These suggestions make the code looks more pythonic.

I have commited these changes
Hi, I am trying to add a new dataset lccc.
All tests are passed.