* common/const.h: Make the coments doxygen compatable.
* rulesets/Character.cpp: Add comments to document tool use.
* rulesets/Fell.cpp, rulesets/Fell.h, rulesets/Task.cpp,
rulesets/Task.h: Add reference to Character to base Task class,
and setup() method for task initiation.
* tests/Tasktest.cpp: Update task test for new changes.
* tests/randomtest.cpp, tests/consttest.cpp: New tests for random
and const headers.
* common/OOGThing.cpp, common/Property.cpp, common/Property.h,
common/Property_impl.h, common/inheritance.h, common/operations.cpp,
rulesets/World.cpp: Update some comments.
* rulesets/Task.h, rulesets/Task.cpp, tests/Tasktest.cpp,
rulesets/Fell.h, rulesets/Fell.cpp: New Task interface for
tasks which take a while to complete. Sample implentation provided
in the form of a Fell task for felling trees.
* rulesets/Character.cpp, rulesets/Character.h: Try out Task
implementation with Fell.
