Add texture handler

Added functionality to load images as textures and bind them to meshes.

utilities/file_utils.h

@@ -11,7 +11,9 @@
  * @param bytes_count Returned bytes count
  * @param buffer Returned filled buffer
  */
-void read_file(const char* file_path, long* bytes_count, char* buffer);
+void rse_read_file(const char* file_path, long* bytes_count, char* buffer);
+
+void rse_write_to_file(const char* file_name, long bytes_count, char* buffer);
 
 #endif /* RSE_FILE_UTILS_H */