Update: state of the art and own contribution in network science for collective intelligence done; objectives partially rewritten

…Still working…

I finished the State of the art and Own contribution to network science for online community management and collective intelligence (sections 1.4.1 and 1.4.2). Please everyone add your own sections under 1.4 as soon as possible. @melancon, I will need your help in reviewing it.

I also went back to specify the objectives in section 1.1, which was a bit too short and too general. I have left comments in there asking for input by @Lakomaa, @Costantino and @markomanka.