Implements #34 via `Bungiesearch.map_raw_results(items)`. Fixes bug when
getting items with `[::True]`.
Bumped to version 0.0.9 to mark end of week bug corrections and
enhancements.
Removed double assignment of `self.raw_results`.
Merge pull request #53 from Sparrho/issue-34

Raw results can now be mapped after list operations