Implement flash within nereid
Implement flash within nereid

Nereid often flashes message using lazystrings. The flash implementation
here converts lazy strings into their internal values.

usudaysingh/nereid,riteshshrv/nereid,usudaysingh/nereid,prakashpp/nereid,fulfilio/nereid,riteshshrv/nereid,prakashpp/nereid,fulfilio/nereid