Multiple minor fixes:

- fixed starting armies of some heroes, including Bron #1602
- (debian) added vcmi-dbg package with debug information
- proper randomization of hero secondary skills, fixes #1603
- second capitol will show up as disabled immediately #1604
- proper deserialization of boost::variant
- empty file will no longer crash JsonNode parser
- fixed some compiler warnings

server/CGameHandler.cpp

@@ -205,9 +205,9 @@ void CGameHandler::levelUpHero(const CGHeroInstance * hero)
 	else if(hlu.skills.size() == 1  ||  hero->tempOwner == PlayerColor::NEUTRAL)  //choose skill automatically
 	{
 		sendAndApply(&hlu);
-		auto rng = [&]()-> ui32
+		auto rng = [&]() mutable -> ui32
 		{
-			return hero->skillsInfo.randomSeed; //must be determined
+			return hero->skillsInfo.distribution(); //must be determined
 		};
 		levelUpHero(hero, vstd::pickRandomElementOf (hlu.skills, rng));
 	}