add_search_paths
Description:
Adds paths to the list of search paths held by this.
The search paths are used by lookup_filename, which can be used to define search paths for the textures source file name or other custom, file-based properties.
Parameters:
| this | 
           a Script  | 
      
| paths | 
           an array of strings containing different search paths  | 
      
| n_paths | 
           the length of the passed array  |