It seems like Google image is doing a double urlencode on the url of the images. So we need to unquote once before sending to the browser the urls.
It solves the 404 we could see with some image with specials chars in url. 
Exemple https://searx.laquadrature.net/?q=etes&pageno=1&category_images (there are two of those in the list)

pep8 : engines

[oscar_template] split up js-files, FIX #132

Adding `import sys` to fix the installer

update of french translation

[fix][template_oscar] make overpass-api call over https and add better error-message

responsive theme courgette

and add better error message if ajax-call fail

Template oscar, add map support

[enh] make version of searx readable

change package data in setup.py for oscar theme

new template: oscar

[enh] add no-js support

* image results have url, which can be clicked
* preferences full functionable without js

* highlight parts of result
* add link to archiv.to
* fix little bugs
* add little icons
* change style of "show map" button