Catch all of the spurious warnings from get_event_loop. #94
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The previous patch that did this only did it for one of the cases, but we actually need to catch this warning for all cases of get_event_loop(). Do that here by wrapping the entire block in catch_warnings(). With this in place, other spurious warnings from downstream packages (like launch) are also quieted.
@cottsay @Voldivh FYI