New Release Notes + Readme drafts

[Cheetham, Anastasia]

Colin and Jess, I've pushed a draft of the new Release Notes and README file to a branch in my github repository:

    https://github.com/acheetham/infusion/tree/FLUID-4120

I'd appreciate feedback on the split, the content, etc. This isn't a pull request yet, just a "review request."

I'm also curious what people think about using MarkDown for the README. Github supports it:
    http://daringfireball.net/projects/markdown/

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Anastasia Cheetham           acheetham at ocad.ca
Inclusive Design Institute  /  OCAD University