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/Unicode.h

@@ -0,0 +1,70 @@
+#ifndef BH_UNICODE_H
+#define BH_UNICODE_H
+
+
+#include "Common.h"
+
+
+
+uint32_t BH_UnicodeLower(uint32_t unit);
+
+
+
+uint32_t BH_UnicodeUpper(uint32_t unit);
+
+
+
+size_t BH_UnicodeDecodeUtf8(const char *string,
+                            size_t size,
+                            uint32_t *unit);
+
+
+
+size_t BH_UnicodeEncodeUtf8(uint32_t unit,
+                            char *string);
+
+
+
+size_t BH_UnicodeDecodeUtf16LE(const char *string,
+                               size_t size,
+                               uint32_t *unit);
+
+
+
+size_t BH_UnicodeDecodeUtf16BE(const char *string,
+                               size_t size,
+                               uint32_t *unit);
+
+
+
+size_t BH_UnicodeEncodeUtf16LE(uint32_t unit,
+                               char *string);
+
+
+
+size_t BH_UnicodeEncodeUtf16BE(uint32_t unit,
+                               char *string);
+
+
+
+size_t BH_UnicodeDecodeUtf32LE(const char *string,
+                               size_t size,
+                               uint32_t *unit);
+
+
+
+size_t BH_UnicodeDecodeUtf32BE(const char *string,
+                               size_t size,
+                               uint32_t *unit);
+
+
+
+size_t BH_UnicodeEncodeUtf32LE(uint32_t unit,
+                               char *string);
+
+
+size_t BH_UnicodeEncodeUtf32BE(uint32_t unit,
+                               char *string);
+
+
+#endif /* BH_UNICODE_H */