Fix Male Assassin unable to use the Sniper Rifle.

Partially fixed the Stukabat being unable to move when target is unreachable.
Removed zombie/gonome bullet resistance.
Add Global Model Replacement and Global Sound Replacement.
Update Tier milestones.

src/dlls/globalreplace.h

@@ -0,0 +1,19 @@
+#ifndef GLOBALREPLACE_H
+#define GLOBALREPLACE_H
+
+#define MAX_REPLACEMENTS 255
+
+namespace REPLACER
+{
+void Init(void);
+bool AddGlobalModel(const char *from, const char *to);
+bool AddGlobalSound(const char *from, const char *to);
+
+const char* FindModelReplacement( edict_t *pMonster, const char *from );
+inline const char* FindModelReplacement( const char *from ) { return FindModelReplacement( NULL, from ); }
+
+const char* FindSoundReplacement( edict_t *pMonster, const char *from );
+inline const char* FindSoundReplacement( const char *from ) { return FindSoundReplacement( NULL, from ); }
+}
+
+#endif