a welcome message in gallery (#7048)
a welcome message in gallery (#7048)

because this is the most full-featured sample we have.
cbracken/flutter,flutter/flutter,tvolkert/flutter,Hixie/flutter,Hixie/flutter,flutter/flutter,Hixie/flutter,flutter/flutter,cbracken/flutter,cbracken/flutter,cbracken/flutter,tvolkert/flutter,Hixie/flutter,cbracken/flutter,tvolkert/flutter,flutter/flutter,tvolkert/flutter,flutter/flutter,tvolkert/flutter,Hixie/flutter,cbracken/flutter,flutter/flutter,Hixie/flutter,flutter/flutter,tvolkert/flutter,Hixie/flutter,tvolkert/flutter,flutter/flutter,turnidge/flutter,turnidge/flutter,flutter/flutter,flutter/flutter,tvolkert/flutter,cbracken/flutter,turnidge/flutter,turnidge/flutter,cbracken/flutter,turnidge/flutter,Hixie/flutter,Hixie/flutter,cbracken/flutter,tvolkert/flutter,Hixie/flutter,tvolkert/flutter,cbracken/flutter