Recent search terms interface.

Change-Id: Ib9c41ca37ba0ac69173ceb4b489f397c3928e8b0
Made search keyboard use 'Go' button.

If article with exact title as search term is in the search
results, the Go button will load that article. If no exact
match, it will load the first article in the search results.

Change-Id: Ia250d9f5e20bc411f7fc3b3d1c9e5bdaa2f77fd7
Tweaks to Recent Searches.

Also now handles really long search terms. As much as I'm
normally against truncation and "...", this is a good
place for it.

Change-Id: I3a0175d103f8e96d424abee604836603922d2452
Made lang picker define delegate for selection notification.

Got rid of a weird compiler warning related to "NAV" define.

Fixed scale of "Searching..." message on iPad.

Change-Id: Ie85937244af7f04255d2594144a027b00afcb34a
Merge "Made lang picker define delegate for selection notification."
Merge remote-tracking branch 'origin/master' into work-libs4

Conflicts:
	wikipedia/Wikipedia-Prefix.pch

Change-Id: Ia8eef17cbcadfb8be93e8c5b924ca090fd24ae43