Refactor, separate docs from headers, add ru docs

Doxygen kind'a sucks and I need multilanguage documentation, so I did
that. Also, separated massive Math.h file into smaller files.

include/BH/Math/Vec2f.h

@@ -0,0 +1,100 @@
+#ifndef BH_MATH_VEC2F_H
+#define BH_MATH_VEC2F_H
+
+#include "../Common.h"
+
+void BH_Vec2fAdd(const float a[2],
+                 const float b[2],
+                 float out[2]);
+
+
+
+void BH_Vec2fSub(const float a[2],
+                 const float b[2],
+                 float out[2]);
+
+
+
+void BH_Vec2fMul(const float a[2],
+                 const float b[2],
+                 float out[2]);
+
+
+
+void BH_Vec2fScale(const float a[2],
+                   float b,
+                   float out[2]);
+
+
+
+void BH_Vec2fMulAdd(const float a[2],
+                    const float b[2],
+                    const float c[2],
+                    float out[2]);
+
+
+
+void BH_Vec2fNegate(const float in[2],
+                    float out[2]);
+
+
+
+float BH_Vec2fDot(const float a[2],
+                  const float b[2]);
+
+
+
+float BH_Vec2fCross(const float a[2],
+                    const float b[2]);
+
+
+
+float BH_Vec2fLength(const float in[2]);
+
+
+
+void BH_Vec2fNormal(const float in[2],
+                    float out[2]);
+
+
+
+float BH_Vec2fNormalEx(const float in[2],
+                       float out[2]);
+
+
+
+void BH_Vec2fMin(const float a[2],
+                 const float b[2],
+                 float out[2]);
+
+
+
+void BH_Vec2fMax(const float a[2],
+                 const float b[2],
+                 float out[2]);
+
+
+
+void BH_Vec2fLerp(const float a[2],
+                  const float b[2],
+                  float t,
+                  float out[2]);
+
+
+
+void BH_Vec2fProject(const float a[2],
+                     const float b[2],
+                     float out[2]);
+
+
+
+void BH_Vec2fBarycentric(const float a[2],
+                         const float b[2],
+                         const float c[2],
+                         float v,
+                         float w,
+                         float out[2]);
+
+
+
+#endif /* BH_MATH_VEC2F */