Add support for per, page and order
Merge pull request #24 from iHiD/per_page_order

Add support for per, page and order
Allow empty hash values in index criteria
Merge pull request #25 from iHiD/hash_values_in_index

Allow empty hash values in index criteria
Don't call API for nil ids
Merge pull request #26 from iHiD/do_not_call_for_nil_id

Don't call API for nil ids
Allow creation of custom samples
Merge pull request #27 from iHiD/custom_samples

Allow creation of custom samples