This commit is also a stepping-stone towards handling http requests
which will require deferred callbacks on Yew Components. By figuring
out how to delay callbacks in this commit, it should be easier to
figure out how to handle http requests that may require a deferred
callback.
"rand" crate was not compilable for wasm-unknown-unknown target, so an
alternative "oorandom" crate was substituted in.
Basic game win/draw detection logic added.
More work was needed to have separate components of the front-end to
communicate with each other. Also added an output-text-box for
informative messages.
