moved files out of subdirectories, added required documentation

src/berzerk_brew.h

@@ -0,0 +1,18 @@
+#ifndef __BERZERK_BREW_H__
+#define __BERZERK_BREW_H__
+
+#include "potion.h"
+
+class berzerk_brew final: public potion {
+        static const int ATK_MUL = 2;
+        inline static const float DEF_MUL = 0.5f;
+        static const int DURATION = 15;
+public:
+        berzerk_brew(const position &pos);
+        void apply(const enum race &race, int &HP, int &ATK, int &DEF,
+                   fraction &base_hit_rate) override;
+        int get_priority() const override;
+        const char *get_name() const override;
+};
+
+#endif