BUG: allowing `metadata is None` is bug prone...
ENH: allow filter in place
TST: add more filter tests
DOC: minor doc change.
ENH: add `inplace` to transform method
TST: Add tests for inplace transform
STY/DOC: minor changes
DOC: Add raises section per @wasade's suggestion.
TST: we're relying a bit too much in copy, which has no tests. Adding a bunch
BUG: fix copy issues uncovered by previous tests
BUG: fix remaining failures
Merge pull request #351 from Jorge-C/inplace

Inplace