update iOS keyboard to use CM3's new event handling format
Merge remote-tracking branch 'schanzer/codemirror-3.1' into codemirror-3.1
remove iPad hack -- whatever CM bug it was designed to work around no longer exists, and now it's become a bug itself.
Merge commit 'dyoo/codemirror-3.1' into codemirror-3.1
Merge remote-tracking branch 'schanzer/codemirror-3.1' into codemirror-3.1
updating codemirror to HEAD