pep8 is deprecated, it is replaced by pycodestyle.

Very useful for test purpose, we have to bench and test that endpoint
to ensure that the main feature works fine. From test part this is
easier to deal with json object.

Improved visibility of buttons in general, including pagination buttons.
Reduced the amount of space used by infobox links.
Other minor changes

Move spot project to python 3. The support of python 2 is
removed related to the issue https://github.com/asciimoo/searx/issues/1471.

The update is mainly done with `2to3` tool and a lot of changes for
the unicode support (see https://docs.python.org/3/howto/unicode.html)

Close: #7

This reverts commit 0dde07cc.

This patch removes the deprecation warning, "cgi.escape is deprecated,
use html.escape instead".

Before this, selecting next page in image gallery would put you in general search again,
also fixed mixed video results on first page, that needs to be handled the same as first
page images (currently missing).

Removed bootstrap dependency, there are many many things, but it is worth it.

Add match_language function in utils to match any user given
language code with a list of engine's supported languages.

Also add language_aliases dict on each engine to translate
standard language codes into the custom codes used by the engine.

fix bug: TypeError: set(['bing', 'google']) is not JSON serializable, when curl 'http://127.0.0.1:8888/?q=xxxxxxxx&categories=general&format=json'

Closes #1047

[fix] rss feed : the jinja template was not found when the rss feed returns an valid feed including an error.

The exact order is
* first from SEARX_SETTINGS_PATH,
* if not found then from searx code base,
* if not found then from /etc/searx/settings.yml
* if not found an exception stops searx loading