Allow editing text of markup in outlineview, so it can be used to tag the text. 
Allow editing text of markup in outlineview, so it can be used to tag the text. 

git-svn-id: cb3fc60f0f557b927b8032d8a94e869b6f9f230b@1952 0fceea05-a30d-0410-8a8b-80ef821fb0a1

jasongrout/skim,camillobruni/skim,camillobruni/skim,camillobruni/skim,jasongrout/skim,camillobruni/skim