Website: Update links for download
Fixed an error when the virtual file picker is called by the web page
Doc: webapge.captureContent
Doc: add libraries requirement on linux
Tests: some webpage were not closed
Merge branch 'v0.8'

Conflicts:
	docs/release-notes.rst
	website/download.html
Tests: add a test on js file loading in webpage
Compatible version of Phantomjs is now 1.9.2
Fixed some network callbacks call with some HTTP response type

For some HTTP response code, onResourceReceived or onResourceRequested
were not called because of some internal errors.
Now the behavior of network management fits better with PhantomJS's
one.

There are still some issue with some http code like 102, 118
or 408: the status code cannot be known (Gecko bug...)

New tests are disabled because some of them fails when
launching all tests....