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/Mat3f.h

@@ -0,0 +1,81 @@
+#ifndef BH_MATH_MAT3F_H
+#define BH_MATH_MAT3F_H
+
+#include "../Common.h"
+
+
+void BH_Mat3fIdentity(float out[9]);
+
+
+
+void BH_Mat3fAdd(const float a[9],
+                 const float b[9],
+                 float out[9]);
+
+
+
+void BH_Mat3fSub(const float a[9],
+                 const float b[9],
+                 float out[9]);
+
+
+
+void BH_Mat3fMul(const float a[9],
+                 const float b[9],
+                 float out[9]);
+
+
+
+void BH_Mat3fScale(const float a[9],
+                   float b,
+                   float out[9]);
+
+
+
+void BH_Mat3fTranspose(const float in[9],
+                       float out[9]);
+
+
+
+float BH_Mat3fTrace(const float in[9]);
+
+
+
+float BH_Mat3fDet(const float in[9]);
+
+
+
+int BH_Mat3fInverse(const float in[9],
+                    float out[9]);
+
+
+
+void BH_Mat3fFromScale(float x,
+                       float y,
+                       float out[9]);
+
+
+
+void BH_Mat3fFromTranslation(float x,
+                             float y,
+                             float out[9]);
+
+
+
+void BH_Mat3fFromRotation(float angle,
+                          float out[9]);
+
+
+
+void BH_Mat3fApplyVec3f(float a[9],
+                        float b[3],
+                        float out[3]);
+
+
+
+void BH_Mat3fApplyVec2f(float a[9],
+                        float b[2],
+                        float out[2]);
+
+
+#endif /* BH_MATH_MAT3F */