make sure there aren't any deprecation warnings that incorrectly say stuff will happen in 1.8

There are a number of deprecations that we expected would be finalized in 1.8, but that won't be, e.g. gh-596, gh-456, gh-294. We've bumped them to reconsider for 1.9, but we should run a grep over the source to make sure that we haven't left any behind any messages that say "Warning: blah balh will happen in numpy 1.8", and if there are any we should replace them with something more vague.
