Add image format and source information to display - needs changes to engines to actually display something.
Displays result.source (website from which the image was taken) and result.img_format (image type and size).
Result is styled with result-format and result-source classes. See PR #1566 for an example of an engine which has the necessary changes.
Strip <span class="highlight">...</span> in the oscar image template.
This PR fixes the result count from bing which was throwing an (hidden) error and add a validation to avoid reading more results than avalaible.
For example :
If there is 100 results from some search and we try to get results from 120 to 130, Bing will send back the results from 0 to 10 and no error. If we compare results count with the first parameter of the request we can avoid this "invalid" results.
The new url parameter "timeout_limit" set timeout limit defined in second.
Example "timeout_limit=1.5" means the timeout limit is 1.5 seconds.
In addition, the query can start with <[number] to set the timeout limit.
For number between 0 and 99, the unit is the second :
Example: "<30 searx" means the timeout limit is 3 seconds
For number above 100, the unit is the millisecond:
Example: "<850 searx" means the timeout is 850 milliseconds.
In addition, there is a new optional setting: outgoing.max_request_timeout.
If not set, the user timeout can't go above searx configuration (as before: the max timeout of selected engine for a query).
If the value is set, the user can set a timeout between 0 and max_request_timeout using
<[number] or timeout_limit query parameter.
Related to #1077
Updated version of PR #1413 from @isj-privacore
Characters that were not ASCII were incorrectly decoded.
Add an helper function: searx.utils.ecma_unescape (Python implementation of unescape Javascript function).
* Search URL is https://www.wikidata.org/w/index.php?{query}&ns0=1 (with ns0=1 at the end to avoid an HTTP redirection)
* url_detail: remove the disabletidy=1 deprecated parameter
* Add eval_xpath function: compile once for all xpath.
* Add get_id_cache: retrieve all HTML with an id, avoid the slow to procress dynamic xpath '//div[@id="{propertyid}"]'.replace('{propertyid}')
* Create an etree.HTMLParser() instead of using the global one (see #1575)
