Support Non Greasmonkey User Script implementations + web.archive.org + autoupdate + ...

* fix #2 by adding support for non Greasmonkey user scripts implementations.
* add support for Specific Presto based implementation resulting in the fastest arte+7 page loads among all browsers.
* removed `triggerOnClick()` which was a dead function.
* fix a couple of warnings jshint (a javascript static analyzer) spotted.
* add updateURL and downloadURL tags in the header, so the script can update itself when new versions come.
* add support for watching archived videos on web.archive.org.
* Update the Readme.
* Add a Firefox converted extension.
* Created an hardlink for Opera because Github doesn't follow Symlinks.
* Set the title of the VideoButtons in order to get more informations before downloading *(resolution + fileSize)*

The Style is still exactly the same.
I'm investigating support for WIN98/2000/XP users with internet explorer with ActiveX.
It should not be much to [create a native extension for Safari](https://developer.apple.com/library/safari/documentation/userexperience/conceptual/safariextensionsconversionguide/Chapters/Greasemonkey.html#//apple_ref/doc/uid/TP40009993-CH4-SW1) too.