Doc: update french features page
Merge pull request #537 from emmanuel-keller/master

Fix file name
Merge branch 'master' of https://github.com/jaeksoft/opensearchserver
Documentation: add some pages about PHP client
Delete fonctionnalites%7Cfonctionnalites%20du%20logiciel%20OpenSearchServer.md~
Merge pull request #538 from AlexandreToyer/master

Documentation: add some pages about PHP client
Update OpenSearchServer_functionalities.md

- fixed a few typos, and a few British spellings that were used out of habit
- fixed a few sentences that looked translated rather than natural
- clarified some sentences and concepts
- checked that the vocabulary in the document was the same as the one in the actual OSS interface. However the SaaS OSS instance running on writeups.org is still a 1.3.1 rev 1974 build 550, so some tabs and options are missing (and having such an old version on my wonderful site makes me feel sad and unloved to boot).
Update Running%20a%20query%20with%20different%20parameters.md

Language & clarity polishing.
Update Using%20autocompletion.md

Language & clarity polishing.
Update Using%20pagination%20to%20navigate%20through%20results.md

Language & clarity polishing.
Update _prefix.md
Merge pull request #546 from emmanuel-keller/master

Improvements