[fix][enh] Multiple JS changes in Oscar

[enh] add photon engine, and fix pep8 errors

[fix] fix kickass engine

thanks @Cqoicebordel in #144:
https://github.com/asciimoo/searx/pull/144#issuecomment-67036903

[enh][oscar_template] replace kickass icon

Kickass torrent search engine

Add kickass in engine list
Add content for the result from kickass

Html+Bugs in templates

Add the alt in favicon

Alt on favicon
No <p> in <p>
Correct alt and title on img

Put the result URL at the top, like in other results template
Put the magnet link on the same line as the stats (peer/seed).

Alt on favicon
Width of image should be 400 and not 400px
Correct alt+title on image
No <p> contains <p>

Courgette was using the wrong template. I assume it was a mistake.

Parse and return results correctly. Pages numbers taken care of.

Not done, and maybe to do :
- 'content' : I don't know what it could be. Maybe votes ?
- 'categories' : the results are not filtered by categories, because I don't see how to do it properly : there are too much categories on Kickass. Is 'video' only movies, or also tv show or porn ? So for now, the category is 'all'.
- Favicon/icon : may be a good idea.