ENH: add IMPORT keyword to ADD_LIBRARY, dependencies are not yet working

STYLE: fix line lengths and indentation, use enum as argument to AddLibrary() instead of int (which was initialized from a bool in some cases)

Alex

Source/cmAddLibraryCommand.h

@@ -76,9 +76,6 @@ public:
     }
   
   cmTypeMacro(cmAddLibraryCommand, cmCommand);
-
-private:
-  std::string LibName;
 };