network: proper support for request hint and receive hint
game: support for request and show hint on current stone
effects: make Effect an interface, add EffectSet class to cascade effects
game: roll + fade on stone set
hints: fix wrong offset of current stone in some cases
fixup: fade effect
game: support for undo move with effect
view: set fov to 21 on landscape, to have more consistent board size on landscape and portrait
refactoring; clear all effects before undo
new option: undo with back button; add quit menu entry to go back

only undo, if client is connected
game: show actionbar if neccessary

show actionbar on all Honeycomb
don't show actionbar on ICS if physical menu button is present
show actionbar on pre Honeycomb
game: dynamically show/enable menu items

enable undo/hint only on local player
show exit item only when undo with back enabled