Work on hosting filter and more...

Hi, 

- I developed the ability to do request filtered by hosting on FilesTube.
It filter the results such as you did for the name, size etc.
- I also developed a method to get all available hosting on the website. The result is given as JSON Array containing key and name for each hosting.
- Last thing, I fix an issue concerning the total page computing. Indeed, I think FilesTube changes the div containing all links for pages, and there is now a link for an arrow... then this one was counted as a page.
- I updated the readme of course

I hope you'll accept it, I tried to do it properly,

Let me know, if something is wrong I'll be happy to contribute to your project,

Best regards,

User4me.