Fixed the python version. Fixed owtf#346

Updated version name and added GSoC participants

Updated changelog

OWTF 0.30 "Summer Storm II": Merge two parts of the same release in C…

…HANGELOG

OWTF 0.20 "Summer Storm I"

OWTF 0.16 "shady citizen"

OWTF 0.15 BruCon

OWTF 0.14 London

OWTF 0.13 HackPra

OWTF 0.12 Wicky