Added support of operational transformation

public/vendor/ot/compress.sh

@@ -0,0 +1,10 @@
+uglifyjs --compress --mangle --output ot.min.js \
+./text-operation.js \
+./selection.js \
+./wrapped-operation.js \
+./undo-manager.js \
+./client.js \
+./codemirror-adapter.js \
+./socketio-adapter.js \
+./ajax-adapter.js \
+./editor-client.js