Buildsystem: Make core buildable under Windows again

- changed OpenSSL detection of headers around slightly
- changed paths to MySQL-headers on Windows in a few files
- removed precompiled header for scripts being built when building game
- added requirement of building revision.h to be built before building shared
- added some generic buildfixes (thanks zor)
- use resource-files, allowing for icons to show up on windows

--HG--
branch : trunk

src/server/game/Globals/ObjectMgr.h

@@ -40,6 +40,7 @@
 #include "ace/Singleton.h"
 #include "SQLStorage.h"
 #include "Vehicle.h"
+#include "Weather.h"
 #include "ObjectMgr.h"
 #include <string>
 #include <map>
@@ -294,20 +295,6 @@ struct QuestPOI
 typedef std::vector<QuestPOI> QuestPOIVector;
 typedef UNORDERED_MAP<uint32, QuestPOIVector> QuestPOIMap;
 
-#define WEATHER_SEASONS 4
-struct WeatherSeasonChances
-{
-    uint32 rainChance;
-    uint32 snowChance;
-    uint32 stormChance;
-};
-
-struct WeatherData
-{
-    WeatherSeasonChances data[WEATHER_SEASONS];
-    uint32 ScriptId;
-};
-
 struct GraveYardData
 {
     uint32 safeLocId;