started making CellStore into a proper class; encapsulated mCell member
Fixed OpenCS build on OS X
encapsulated mState
encapsulated mIds
encapsulated water level
make Ptr a bit more pointer-like
moved CellRefList into a separate file
encapsulated reference collections
various bits of cleanup
keep track of which cells have state that needs to be saved
Merge branch 'cellstore'
re-enabled OGRE in OpenCS; cleaned up startup
added navigation mode enum to SceneWidget
moving the camera with W and S keys
use shift key to speed up camera movement
moving the camera with A and D keys
mouse wheel zooming
camera panning via left button drag
getting rid of some magic numbers
camera rotation via ctrl-left button drag