Fix basic pasting
Fix basic pasting

Issue #277

adrianheine/prosemirror,salzhrani/prosemirror,kiejo/prosemirror,adrianheine/prosemirror,tzuhsiulin/prosemirror,adrianheine/prosemirror,tzuhsiulin/prosemirror,tzuhsiulin/prosemirror,mattberkowitz/prosemirror,mattberkowitz/prosemirror,salzhrani/prosemirror,kiejo/prosemirror,salzhrani/prosemirror,kiejo/prosemirror