Refactoring the characters floater code.

indra/newview/CMakeLists.txt

indra/newview/llfloaterpathfindingcharacters.cpp

indra/newview/llfloaterpathfindingcharacters.h

indra/newview/llfloaterpathfindinglinksets.cpp

indra/newview/llfloaterpathfindinglinksets.h

indra/newview/llpathfindingcharacter.cpp

indra/newview/llpathfindingcharacter.h

indra/newview/llpathfindingcharacterlist.cpp

indra/newview/llpathfindingcharacterlist.h

indra/newview/llpathfindingmanager.cpp

indra/newview/llpathfindingmanager.h

...w/skins/default/xui/en/floater_pathfinding_characters.xml

...view/skins/default/xui/en/floater_pathfinding_console.xml

...iew/skins/default/xui/en/floater_pathfinding_linksets.xml