Large rewrite of adventure map objects:
- replaced CDefObjInfo with ObjectTemplate class
- ObjectTempate is a direct member of objects instead of pointer with
shared ownership across CMap, handler and game objects
- simplified handling of objects that can change appearance (e.g. towns)
- all object queries regarding object appearance/blockmaps use h3m pos
instead of relative positions
- removed need of modhandler::reload
- cleanup of some old code


git-svn-id: http://svn.code.sf.net/p/vcmi/code/trunk/@3697 4dfc6b2a-8b31-0410-aa91-d6c70e3ac834