guzzle; psr0; updated namespacing; php 5.4 arrays; removed google+; updated doc

[younes0]

Complete refactor to use Guzzle v5 which improves speed #4. Note that I removed Google+: I didn't take time to take a look on the payload parameter and it seems that Google + is not used as it used to be? https://www.google.fr/search?q=google+%2B&gws_rd=cr,ssl&ei=mwfSVa_hN4XtaNuMrZgF#q=google+%2B+dead&tbs=qdr:m