First work on jQuery language extension

Need to find a good documentation way.
Of course methods need implementation!
+ .travis.yml
[travis] Bad version — [ant] Fail on error
[travis] + Build status
Work on languages.js
[Configuration] Fixed last changes to pass the tests
Merge branch 'master' into guimier-messages
Adapted test to old PHP versions
[languages.js] Fixed messages usage

Still need to build language change.
[ajax.js] Fixed boolean values to match PHP implementation

Also fixed syntax in languages.js
[languages.js] Added language change
[languages.js] Messages lists are objects, not arrays

Was querying the server for each language change, which is not needed.
[syntax] Try to fix “Unexpected '['” error

See https://travis-ci.org/Guimier/zzchat/jobs/41296767#L38
[doc-js] Fixed syntax; improved documentation
[WebContext] Switched to flags-implementation of parameter selection
[autofixes] Added rights; added classes list to ant targets
Merge branch 'master' of https://github.com/Guimier/zzchat
[AjaxQuery] Removed minor failing test.

The indentation test was tested more PHP’s json_encode (which varies between versions) than our AjaxQuery Output. This part of the code is not essential, it is only development convenience.
[travis] Test 5.3.3

Our main target.
[doc] Added automatic warnings for PHPUnit’s @codeCoverageIgnore