* rulesets/EntityProperty.h, rulesets/EntityProperty.cpp:
Refactor so this property is always dynamic, and add an accessor.
* rulesets/Character.cpp, rulesets/Character.h: Remove the hard
coded entity references used for wield tool, and replace with
a dynamic property.
* rulesets/attributes.h, server/Persistor_impl.h,
server/Restorer.cpp: Remove right_hand_wield from the
persistence layer, pending its complete removal.
* rulesets/EntityProperty.h, rulesets/EntityProperty.cpp:
Make EntityProperty a more normal property by making it hold
a reference to its value, not the value itself.
* rulesets/Character.cpp, rulesets/Character.h: Use EntityProperty
for right_hand_wield attribute, so it stores the value long term
which I think is more efficient.
* rulesets/GuiseProperty.cpp, rulesets/GuiseProperty.h:
New property class to handle guise data. I think we had decided
to call this property something else, but I can't remember what.
* common/Property.h, rulesets/EntityProperty.h,
rulesets/LineProperty.h: Regularise argument names in property
classes, to make checking easier and reduce chance of mimatched
overriding.
* Doxyfile: Add tools to the documented code.
* index.dox: Update documentation index.
* tools/cycmd.cpp: Add a document page for this tool.
* common/DynamicProperty.h, common/Property.cpp, common/Property.h,
rulesets/AreaProperty.h, rulesets/CalendarProperty.h,
rulesets/EntityProperty.h, rulesets/LineProperty.h,
rulesets/StatisticsProperty.h, rulesets/TerrainProperty.h:
Add all property classes into a property group.
