Update readme.md
Update readme.md

Minor licence copyright update. Updated year to 2016 as there were significant changes made  to the code this year.
tiger-seo/Codeception,Naktibalda/Codeception,Codeception/base,janhenkgerritsen/Codeception,TehJoE/Codeception,tasselchof/Codeception,Vreasy/Codeception,pitpit/Codeception,Naktibalda/Codeception,tasselchof/Codeception,kt81/Codeception,Naktibalda/Codeception,hubbyist/Codeception,hubbyist/Codeception,tasselchof/Codeception,TehJoE/Codeception,sergeyklay/Codeception,Codeception/base,Codeception/Codeception,tiger-seo/Codeception,kt81/Codeception,sergeyklay/Codeception,janhenkgerritsen/Codeception,pitpit/Codeception,Vreasy/Codeception,Codeception/Codeception,Codeception/base