New vars for splitPane, debounce and editorFocusInstance added
Split pane controls added and center themselves and can now trigger
single and split pane views
Editor functions added here for focus, blur, onkeyup, oncursoractivity,
onchange and oninputread, can handle requests from either main or diff
pane
updateDiffs function added which will show differences between 2 panes
using jsdifflib and markText
updatePreviewWindow now it's own function too
Many functions redone so they can also take requests from either main or
diff panes, by using thisCM instead of cM
getcMdiffInstance function also added
Diff pane also updated on changing settings and switching tab
4c27e23d80