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/Args.h

@@ -24,32 +24,6 @@ typedef struct BH_ArgsOption
 typedef int (*BH_ArgsCallback)(int key, char *arg, void *data);
 
 
-/**
- * Parses command line \a options (given by \a argc and \a argv) and calls the
- * specified \a callback with \a data.
- *
- * There are few internal rules:
- * - If the "--" argument is specified, option parsing stops, and the rest of
- *   the arguments are processed as is.
- * - If the "-" argument is specified, it is processed as is.
- * - For long options, if a value is required, the string after the equal sign
- *   or the next argument will be used as the value ("--define=Value" or
- *   "--define Value").
- * - For short options, if a value is required, the string after the option
- *   letter or the next argument will be used as the value ("-DValue" or
- *   "-D Value").
- *
- * Options array should have last element filled with zeros.
- *
- * \param argc      Arguments count
- * \param argv      Arguments array
- * \param options   Options array pointer
- * \param callback  Callback function
- * \param data      Callback data
- *
- * \return On success, returns zero value.
- * \return On failure, returns error code.
- */
 int BH_ArgsParse(int argc,
                  char **argv,
                  BH_ArgsOption *options,
@@ -57,12 +31,6 @@ int BH_ArgsParse(int argc,
                  void *data);
 
 
-/**
- * Prints documentation for \a options (with specified \a padding).
- *
- * \param options  Options array pointer
- * \param padding  Padding
- */
 void BH_ArgsHelp(BH_ArgsOption *options,
                  int padding);