Stop using ActionManager.getActionManager
Merge pull request #228 from csmith/master

Store display properties in Line.
Merge pull request #229 from greboid/master

Stop using ActionManager.getActionManager
Stop installActionPack method being static.
Merge pull request #230 from greboid/master

Stop installActionPack method being static.
Remove get/set ActionManager methods.
Merge pull request #231 from greboid/master

Remove get/set ActionManager methods.
Remove StyledDocument stuff from styliser.

Put it behind a nice interface, so the styliser can work without it
and be tested, and other UIs don't have to use swing junk.