m04 patterns for web apps

[iamabhutta]

Starting with Sum26 slides
TODO:
-update slides as needed
-add link for socket io tutorial when that is published.

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[iamabhutta]

S10/11 currently hidden. It would be useful to unhide one of them.
S12: I would change this a bit to transition from "protocol to pattern" - may be add something like "one way to build client-server system - CSR pattern". or may be swap order of S12/S13.
S14 is empty
S15 has no title
S16 has title and nothing else
S31/32: what is the point of these slides? do we really need them here.
S33: title should say: Review of CSR or something (otherwise it sounds like review of the lecture, which it is not)
S34: perhaps we should say that in real world, or "real web apps: one server many clients"
S41/42: perhaps make title more descriptive
S44 can stay
We need a transition slide here .... first we talked about protocols, then CSR then scaling, now what?
S45 can stay (move to beginning)
S47-49: May be move them earlier? S46-48 can be deleted.
S49 is useful slide, either move it earlier or we can reuse it somewhere else!