Glances 2.4.2

Bugs corrected:

* Process no longer exists (again) (issue #613)
* Crash when "top extended stats" is enabled on OS X (issue #612)
* Graphical percentage bar displays "?" (issue #608)
* Quick look doesn't work (issue #605)
* [Web UI] Display empty Battery sensors enhancement (issue #601)
* [Web UI] Per CPU plugin has to be improved (issue #566)