First pass at Kickass Engine

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.
Add KickAss engine
Add icons and badge for the themes
Add kickass in engine list
Add content for the result from kickass
Merge pull request #144 from Cqoicebordel/KickassTorrent-Search-Engine

Kickass torrent search engine
[enh][oscar_template] replace kickass icon
Merge pull request #150 from pointhi/oscar_image_fix

[enh][oscar_template] replace kickass icon
[fix] fix kickass engine

thanks @Cqoicebordel in #144:
https://github.com/asciimoo/searx/pull/144#issuecomment-67036903
Merge pull request #151 from pointhi/kickass_fix

[fix] fix kickass engine
[enh] add photon engine
[fix] remove useless print statement
[fix] pep8
[fix] pep8
[fix] pep8
[mod] strict timeout handling
[fix] timeout and response parsing order
[fix] Show map on result in Oscar
Allow to find the leafleet js when searx is not installed at the root of the web server.
Some more path issues
Add double clic on categories
Allow to double clic on any category to activate or deactivate all categories.
[mod] display timeoutted engine name
[fix] handle empty search requests