Added public function to set user data from client
Added public function to set user data from client

nokitakaze/sentry-php,hautelook/sentry-client,ste93cry/sentry-php,cpascal/raven-php,patrick91/raven-php,getsentry/raven-php,madssj/raven-php,theand/raven-php,mfn/raven-php,ManhattanPrep/raven-php,getsentry/sentry-php,getsentry/sentry-php,ruudk/sentry-client