Add missing attributes to pagination class

Add per_page, next_num and prev_num to Pagination class.

Fixes #41

Signed-off-by: Christoph Kassen <c.kassen@telekom.de>
Clean up pagination object

Remove unused code from Paginator class

Signed-off-by: Christoph Kassen <c.kassen@telekom.de>
Merge pull request #43 from TelekomCloud/bugfix/issue_41

Trivial changes. Merging myself.