[Merge] lp:~fboucault/webbrowser-app/add_peekier_search into lp:webbrowser-app/staging

[Olivier Tilloy]

Review: Approve

LGTM.

It looks like we could get search suggestions as we type from https://search.peekier.com/suggestions, but that appears to work only with POST requests, and the opensearch specification doesn't seem to allow that (nor does our implementation).

Plain searches will be good enough for now.
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https://code.launchpad.net/~fboucault/webbrowser-app/add_peekier_search/+merge/317206
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