Prevent of noumerus Subtitles YIFY server requests & parsing

Prevention of various requests & parsing from and to the yify subtitles server

By replacing a subtitle link to another format
e.g: http://www.yifysubtitles.com/subtitles/the-wolf-of-wall-street-dutch-yify-8954 (to download page)

to direct download:
http://www.yifysubtitles.com/subtitle/the-wolf-of-wall-street-dutch-yify-8954.zip (replacing subtitles in subtitle and adding .zip)